CWE-401
AllowedMissing Release of Memory after Effective Lifetime
Abstraction: Variant · Status: Draft
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
2187 vulnerabilities reference this CWE, most recent first.
GHSA-5CG2-HFC8-XX57
Vulnerability from github – Published: 2025-09-24 12:30 – Updated: 2025-12-12 21:31In the Linux kernel, the following vulnerability has been resolved:
wifi: ath12k: fix memory leak in ath12k_service_ready_ext_event
Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps is not freed in the failure case, causing a memory leak. The following trace is observed in kmemleak:
unreferenced object 0xffff8b3eb5789c00 (size 1024): comm "softirq", pid 0, jiffies 4294942577 hex dump (first 32 bytes): 00 00 00 00 01 00 00 00 00 00 00 00 7b 00 00 10 ............{... 01 00 00 00 00 00 00 00 01 00 00 00 1f 38 00 00 .............8.. backtrace (crc 44e1c357): __kmalloc_noprof+0x30b/0x410 ath12k_wmi_mac_phy_caps_parse+0x84/0x100 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k] ath12k_wmi_svc_rdy_ext_parse+0x308/0x4c0 [ath12k] ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k] ath12k_service_ready_ext_event.isra.0+0x44/0xd0 [ath12k] ath12k_wmi_op_rx+0x2eb/0xd70 [ath12k] ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k] ath12k_ce_recv_process_cb+0x218/0x300 [ath12k] ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k] process_one_work+0x219/0x680 bh_worker+0x198/0x1f0 tasklet_action+0x13/0x30 handle_softirqs+0xca/0x460 __irq_exit_rcu+0xbe/0x110 irq_exit_rcu+0x9/0x30
Free svc_rdy_ext.mac_phy_caps in the error case to fix this memory leak.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
{
"affected": [],
"aliases": [
"CVE-2025-39890"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-24T11:15:32Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix memory leak in ath12k_service_ready_ext_event\n\nCurrently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps\nis not freed in the failure case, causing a memory leak. The following\ntrace is observed in kmemleak:\n\nunreferenced object 0xffff8b3eb5789c00 (size 1024):\n comm \"softirq\", pid 0, jiffies 4294942577\n hex dump (first 32 bytes):\n 00 00 00 00 01 00 00 00 00 00 00 00 7b 00 00 10 ............{...\n 01 00 00 00 00 00 00 00 01 00 00 00 1f 38 00 00 .............8..\n backtrace (crc 44e1c357):\n __kmalloc_noprof+0x30b/0x410\n ath12k_wmi_mac_phy_caps_parse+0x84/0x100 [ath12k]\n ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]\n ath12k_wmi_svc_rdy_ext_parse+0x308/0x4c0 [ath12k]\n ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]\n ath12k_service_ready_ext_event.isra.0+0x44/0xd0 [ath12k]\n ath12k_wmi_op_rx+0x2eb/0xd70 [ath12k]\n ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k]\n ath12k_ce_recv_process_cb+0x218/0x300 [ath12k]\n ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k]\n process_one_work+0x219/0x680\n bh_worker+0x198/0x1f0\n tasklet_action+0x13/0x30\n handle_softirqs+0xca/0x460\n __irq_exit_rcu+0xbe/0x110\n irq_exit_rcu+0x9/0x30\n\nFree svc_rdy_ext.mac_phy_caps in the error case to fix this memory leak.\n\nTested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1",
"id": "GHSA-5cg2-hfc8-xx57",
"modified": "2025-12-12T21:31:32Z",
"published": "2025-09-24T12:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39890"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1089f65b2de78c7837ef6b4f26146a5a5b0b9749"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a392f874ac83a77ad0e53eb8aafdbeb787c9298"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89142d34d5602c7447827beb181fa06eb08b9d5c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/99dbad1b01d3b2f361a9db55c1af1212be497a3d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5CMC-7W2J-JPJ5
Vulnerability from github – Published: 2022-05-24 17:34 – Updated: 2022-05-24 17:34Uncontrolled resource consumption in EDK II may allow an unauthenticated user to potentially enable denial of service via network access.
{
"affected": [],
"aliases": [
"CVE-2019-14559"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-11-23T16:15:00Z",
"severity": "HIGH"
},
"details": "Uncontrolled resource consumption in EDK II may allow an unauthenticated user to potentially enable denial of service via network access.",
"id": "GHSA-5cmc-7w2j-jpj5",
"modified": "2022-05-24T17:34:47Z",
"published": "2022-05-24T17:34:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14559"
},
{
"type": "WEB",
"url": "https://bugzilla.tianocore.org/show_bug.cgi?id=2031"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00032.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-5CMQ-7JHJ-36R8
Vulnerability from github – Published: 2026-01-23 15:31 – Updated: 2026-02-26 21:31In the Linux kernel, the following vulnerability has been resolved:
net: usb: rtl8150: fix memory leak on usb_submit_urb() failure
In async_set_registers(), when usb_submit_urb() fails, the allocated async_req structure and URB are not freed, causing a memory leak.
The completion callback async_set_reg_cb() is responsible for freeing these allocations, but it is only called after the URB is successfully submitted and completes (successfully or with error). If submission fails, the callback never runs and the memory is leaked.
Fix this by freeing both the URB and the request structure in the error path when usb_submit_urb() fails.
{
"affected": [],
"aliases": [
"CVE-2025-71154"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-23T15:16:06Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: rtl8150: fix memory leak on usb_submit_urb() failure\n\nIn async_set_registers(), when usb_submit_urb() fails, the allocated\n async_req structure and URB are not freed, causing a memory leak.\n\n The completion callback async_set_reg_cb() is responsible for freeing\n these allocations, but it is only called after the URB is successfully\n submitted and completes (successfully or with error). If submission\n fails, the callback never runs and the memory is leaked.\n\n Fix this by freeing both the URB and the request structure in the error\n path when usb_submit_urb() fails.",
"id": "GHSA-5cmq-7jhj-36r8",
"modified": "2026-02-26T21:31:27Z",
"published": "2026-01-23T15:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71154"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/12cab1191d9890097171156d06bfa8d31f1e39c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/151403e903840c9cf06754097b6732c14f26c532"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2f966186b99550e3c665dbfb87b8314e30acea02"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4bd4ea3eb326608ffc296db12c105f92dc2f2190"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6492ad6439ff1a479fc94dc6052df3628faed8b6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a4e2442d3c48355a84463342f397134f149936d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/db2244c580540306d60ce783ed340190720cd429"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5CP3-HG96-HVR9
Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2024-10-24 21:31In the Linux kernel, the following vulnerability has been resolved:
net: mdiobus: fix unbalanced node reference count
I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:
OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0
If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak.
If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.
{
"affected": [],
"aliases": [
"CVE-2022-49016"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T20:15:12Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdiobus: fix unbalanced node reference count\n\nI got the following report while doing device(mscc-miim) load test\nwith CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:\n\n OF: ERROR: memory leak, expected refcount 1 instead of 2,\n of_node_get()/of_node_put() unbalanced - destroy cset entry:\n attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0\n\nIf the \u0027fwnode\u0027 is not an acpi node, the refcount is get in\nfwnode_mdiobus_phy_device_register(), but it has never been\nput when the device is freed in the normal path. So call\nfwnode_handle_put() in phy_device_release() to avoid leak.\n\nIf it\u0027s an acpi node, it has never been get, but it\u0027s put\nin the error path, so call fwnode_handle_get() before\nphy_device_register() to keep get/put operation balanced.",
"id": "GHSA-5cp3-hg96-hvr9",
"modified": "2024-10-24T21:31:02Z",
"published": "2024-10-21T21:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49016"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5CPJ-J8XH-5RGH
Vulnerability from github – Published: 2026-03-25 18:31 – Updated: 2026-03-25 18:31A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit of Cisco IOS Software and IOS XE Software could allow the attacker to cause the affected device to reload, resulting in a DoS condition. A successful exploit of Cisco Secure Firewall ASA Software and Secure FTD Software could allow the attacker to partially exhaust system memory, resulting in system instability, such as the inability to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.
{
"affected": [],
"aliases": [
"CVE-2026-20012"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-25T16:16:10Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition on an affected device.\n\n This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit of Cisco IOS Software and IOS XE Software could allow the attacker to cause the affected device to reload, resulting in a DoS condition. A successful exploit of Cisco Secure Firewall ASA Software and Secure FTD Software could allow the attacker to partially exhaust system memory, resulting in system instability, such as the inability to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.",
"id": "GHSA-5cpj-j8xh-5rgh",
"modified": "2026-03-25T18:31:46Z",
"published": "2026-03-25T18:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20012"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-ios-dos-kPEpQGGK"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5CQV-55PW-MRCP
Vulnerability from github – Published: 2022-05-24 19:20 – Updated: 2022-05-24 19:20pdf2xml v2.0 was discovered to contain a memory leak in the function TextPage::testLinkedText.
{
"affected": [],
"aliases": [
"CVE-2020-23876"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-11-10T22:15:00Z",
"severity": "HIGH"
},
"details": "pdf2xml v2.0 was discovered to contain a memory leak in the function TextPage::testLinkedText.",
"id": "GHSA-5cqv-55pw-mrcp",
"modified": "2022-05-24T19:20:14Z",
"published": "2022-05-24T19:20:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-23876"
},
{
"type": "WEB",
"url": "https://github.com/kermitt2/pdf2xml/issues/14"
},
{
"type": "WEB",
"url": "https://github.com/Aurorainfinity/Poc/tree/master/pdf2xml"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-5CRP-HWJ6-6WWW
Vulnerability from github – Published: 2026-03-18 18:31 – Updated: 2026-05-29 21:31In the Linux kernel, the following vulnerability has been resolved:
regmap: maple: free entry on mas_store_gfp() failure
regcache_maple_write() allocates a new block ('entry') to merge adjacent ranges and then stores it with mas_store_gfp(). When mas_store_gfp() fails, the new 'entry' remains allocated and is never freed, leaking memory.
Free 'entry' on the failure path; on success continue freeing the replaced neighbor blocks ('lower', 'upper').
{
"affected": [],
"aliases": [
"CVE-2026-23260"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-18T18:16:24Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: maple: free entry on mas_store_gfp() failure\n\nregcache_maple_write() allocates a new block (\u0027entry\u0027) to merge\nadjacent ranges and then stores it with mas_store_gfp().\nWhen mas_store_gfp() fails, the new \u0027entry\u0027 remains allocated and\nis never freed, leaking memory.\n\nFree \u0027entry\u0027 on the failure path; on success continue freeing the\nreplaced neighbor blocks (\u0027lower\u0027, \u0027upper\u0027).",
"id": "GHSA-5crp-hwj6-6www",
"modified": "2026-05-29T21:31:16Z",
"published": "2026-03-18T18:31:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23260"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/811b45e2d795d955bb7fd9c816b40036f4fde350"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d61171cf097156030142643942c217759a9cc806"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f08f2d2907675926ac5657b25f86d921f269602a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f3f380ce6b3d5c9805c7e0b3d5bc28d9ec41e2e8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5CVC-J2XM-H554
Vulnerability from github – Published: 2022-05-24 17:05 – Updated: 2025-12-03 21:30xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
{
"affected": [],
"aliases": [
"CVE-2019-19956"
],
"database_specific": {
"cwe_ids": [
"CWE-401",
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-12-24T16:15:00Z",
"severity": "MODERATE"
},
"details": "xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc-\u003eoldNs.",
"id": "GHSA-5cvc-j2xm-h554",
"modified": "2025-12-03T21:30:58Z",
"published": "2022-05-24T17:05:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19956"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-292794.pdf"
},
{
"type": "WEB",
"url": "https://gitlab.gnome.org/GNOME/libxml2/commit/5a02583c7e683896d84878bd90641d8d9b0d0549"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/12/msg00032.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200114-0002"
},
{
"type": "WEB",
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-103-08"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4274-1"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2020.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00005.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5F6G-Q8F6-3C5X
Vulnerability from github – Published: 2024-02-28 09:30 – Updated: 2024-12-12 18:30In the Linux kernel, the following vulnerability has been resolved:
mt76: mt7915: fix tx skb dma unmap
The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries
{
"affected": [],
"aliases": [
"CVE-2021-47032"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-28T09:15:39Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7915: fix tx skb dma unmap\n\nThe first pointer in the txp needs to be unmapped as well, otherwise it will\nleak DMA mapping entries",
"id": "GHSA-5f6g-q8f6-3c5x",
"modified": "2024-12-12T18:30:49Z",
"published": "2024-02-28T09:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47032"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a9dcd6efb2a268fc5707dcfb3b0c412975c4462"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4e7914ce23306b28d377ec395e00e5fde0e6f96e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7dcf3c04f0aca746517a77433b33d40868ca4749"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2cdc9cb33c5963efe1a7c022753386f9463d1b7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5FX7-QFG5-MPMC
Vulnerability from github – Published: 2024-02-27 21:31 – Updated: 2025-01-08 18:30In the Linux kernel, the following vulnerability has been resolved:
ovl: fix leaked dentry
Since commit 6815f479ca90 ("ovl: use only uppermetacopy state in ovl_lookup()"), overlayfs doesn't put temporary dentry when there is a metacopy error, which leads to dentry leaks when shutting down the related superblock:
overlayfs: refusing to follow metacopy origin for (/file0) ... BUG: Dentry (_ptrval_){i=3f33,n=file3} still in use (1) [unmount of overlay overlay] ... WARNING: CPU: 1 PID: 432 at umount_check.cold+0x107/0x14d CPU: 1 PID: 432 Comm: unmount-overlay Not tainted 5.12.0-rc5 #1 ... RIP: 0010:umount_check.cold+0x107/0x14d ... Call Trace: d_walk+0x28c/0x950 ? dentry_lru_isolate+0x2b0/0x2b0 ? __kasan_slab_free+0x12/0x20 do_one_tree+0x33/0x60 shrink_dcache_for_umount+0x78/0x1d0 generic_shutdown_super+0x70/0x440 kill_anon_super+0x3e/0x70 deactivate_locked_super+0xc4/0x160 deactivate_super+0xfa/0x140 cleanup_mnt+0x22e/0x370 __cleanup_mnt+0x1a/0x30 task_work_run+0x139/0x210 do_exit+0xb0c/0x2820 ? __kasan_check_read+0x1d/0x30 ? find_held_lock+0x35/0x160 ? lock_release+0x1b6/0x660 ? mm_update_next_owner+0xa20/0xa20 ? reacquire_held_locks+0x3f0/0x3f0 ? __sanitizer_cov_trace_const_cmp4+0x22/0x30 do_group_exit+0x135/0x380 __do_sys_exit_group.isra.0+0x20/0x20 __x64_sys_exit_group+0x3c/0x50 do_syscall_64+0x45/0x70 entry_SYSCALL_64_after_hwframe+0x44/0xae ... VFS: Busy inodes after unmount of overlay. Self-destruct in 5 seconds. Have a nice day...
This fix has been tested with a syzkaller reproducer.
{
"affected": [],
"aliases": [
"CVE-2021-46972"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-27T19:04:07Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix leaked dentry\n\nSince commit 6815f479ca90 (\"ovl: use only uppermetacopy state in\novl_lookup()\"), overlayfs doesn\u0027t put temporary dentry when there is a\nmetacopy error, which leads to dentry leaks when shutting down the related\nsuperblock:\n\n overlayfs: refusing to follow metacopy origin for (/file0)\n ...\n BUG: Dentry (____ptrval____){i=3f33,n=file3} still in use (1) [unmount of overlay overlay]\n ...\n WARNING: CPU: 1 PID: 432 at umount_check.cold+0x107/0x14d\n CPU: 1 PID: 432 Comm: unmount-overlay Not tainted 5.12.0-rc5 #1\n ...\n RIP: 0010:umount_check.cold+0x107/0x14d\n ...\n Call Trace:\n d_walk+0x28c/0x950\n ? dentry_lru_isolate+0x2b0/0x2b0\n ? __kasan_slab_free+0x12/0x20\n do_one_tree+0x33/0x60\n shrink_dcache_for_umount+0x78/0x1d0\n generic_shutdown_super+0x70/0x440\n kill_anon_super+0x3e/0x70\n deactivate_locked_super+0xc4/0x160\n deactivate_super+0xfa/0x140\n cleanup_mnt+0x22e/0x370\n __cleanup_mnt+0x1a/0x30\n task_work_run+0x139/0x210\n do_exit+0xb0c/0x2820\n ? __kasan_check_read+0x1d/0x30\n ? find_held_lock+0x35/0x160\n ? lock_release+0x1b6/0x660\n ? mm_update_next_owner+0xa20/0xa20\n ? reacquire_held_locks+0x3f0/0x3f0\n ? __sanitizer_cov_trace_const_cmp4+0x22/0x30\n do_group_exit+0x135/0x380\n __do_sys_exit_group.isra.0+0x20/0x20\n __x64_sys_exit_group+0x3c/0x50\n do_syscall_64+0x45/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n ...\n VFS: Busy inodes after unmount of overlay. Self-destruct in 5 seconds. Have a nice day...\n\nThis fix has been tested with a syzkaller reproducer.",
"id": "GHSA-5fx7-qfg5-mpmc",
"modified": "2025-01-08T18:30:40Z",
"published": "2024-02-27T21:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46972"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/71d58457a8afc650da5d3292a7f7029317654d95"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf3e3330bc5719fa9d658e3e2f596bde89344a94"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d587cfaef72b1b6f4b2774827123bce91f497cc8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-41
Strategy: Libraries or Frameworks
- Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
- For example, glibc in Linux provides protection against free of invalid pointers.
- When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
- To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.
Mitigation
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation
Consider using the Boehm-Demers-Weiser garbage collector (bdwgc), which can help avoid leaks.
No CAPEC attack patterns related to this CWE.