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EUVD-2026-345115
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 07:59
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T07:59:56.016184+00:00",
"id": "EUVD-2026-345115"
}
CVE-2023-52999 (GCVE-0-2023-52999)
Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-08-05 09:12
VLAI
EPSS
VEX
Title
net: fix UaF in netns ops registration error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: fix UaF in netns ops registration error path
If net_assign_generic() fails, the current error path in ops_init() tries
to clear the gen pointer slot. Anyway, in such error path, the gen pointer
itself has not been modified yet, and the existing and accessed one is
smaller than the accessed index, causing an out-of-bounds error:
BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320
Write of size 8 at addr ffff888109124978 by task modprobe/1018
CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x6a/0x9f
print_address_description.constprop.0+0x86/0x2b5
print_report+0x11b/0x1fb
kasan_report+0x87/0xc0
ops_init+0x2de/0x320
register_pernet_operations+0x2e4/0x750
register_pernet_subsys+0x24/0x40
tcf_register_action+0x9f/0x560
do_one_initcall+0xf9/0x570
do_init_module+0x190/0x650
load_module+0x1fa5/0x23c0
__do_sys_finit_module+0x10d/0x1b0
do_syscall_64+0x58/0x80
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f42518f778d
Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48
89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48
RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d
RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003
RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000
</TASK>
This change addresses the issue by skipping the gen pointer
de-reference in the mentioned error-path.
Found by code inspection and verified with explicit error injection
on a kasan-enabled kernel.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-27 16:59 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5a2ea549be94924364f6911227d99be86e8cf34a , < ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea
(git)
Affected: 97ad240fd9aa9214497d14af2b91608e20856cac , < ddd49cbbd4c1ceb38032018b589b44208e54f55e (git) Affected: c3edc6e808209aa705185f732e682a370981ced1 , < d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0 (git) Affected: a1e18acb0246bfb001b08b8b1b830b5ec92a0f13 , < 66689a72ba73575e76d4f6a8748d3fa2690ec1c4 (git) Affected: d266935ac43d57586e311a087510fe6a084af742 , < 12075708f2e77ee6a9f8bb2cf512c38be3099794 (git) Affected: d266935ac43d57586e311a087510fe6a084af742 , < 71ab9c3e2253619136c31c89dbb2c69305cc89b1 (git) Affected: 4a4df5e78712de39d6f90d6a64b5eb48dca03bd5 (git) Affected: 4.19.264 , < 4.19.272 (semver) Affected: 5.4.223 , < 5.4.231 (semver) Affected: 5.10.153 , < 5.10.166 (semver) Affected: 5.15.77 , < 5.15.91 (semver) Affected: 6.0.7 , < 6.1 (semver) |
|
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 4.19.272 , ≤ 4.19.* (semver) Unaffected: 5.4.231 , ≤ 5.4.* (semver) Unaffected: 5.10.166 , ≤ 5.10.* (semver) Unaffected: 5.15.91 , ≤ 5.15.* (semver) Unaffected: 6.1.9 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
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{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-52999",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-27T16:59:38.580749Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-03-27T17:08:22.062Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/core/net_namespace.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea",
"status": "affected",
"version": "5a2ea549be94924364f6911227d99be86e8cf34a",
"versionType": "git"
},
{
"lessThan": "ddd49cbbd4c1ceb38032018b589b44208e54f55e",
"status": "affected",
"version": "97ad240fd9aa9214497d14af2b91608e20856cac",
"versionType": "git"
},
{
"lessThan": "d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0",
"status": "affected",
"version": "c3edc6e808209aa705185f732e682a370981ced1",
"versionType": "git"
},
{
"lessThan": "66689a72ba73575e76d4f6a8748d3fa2690ec1c4",
"status": "affected",
"version": "a1e18acb0246bfb001b08b8b1b830b5ec92a0f13",
"versionType": "git"
},
{
"lessThan": "12075708f2e77ee6a9f8bb2cf512c38be3099794",
"status": "affected",
"version": "d266935ac43d57586e311a087510fe6a084af742",
"versionType": "git"
},
{
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"status": "affected",
"version": "d266935ac43d57586e311a087510fe6a084af742",
"versionType": "git"
},
{
"status": "affected",
"version": "4a4df5e78712de39d6f90d6a64b5eb48dca03bd5",
"versionType": "git"
},
{
"lessThan": "4.19.272",
"status": "affected",
"version": "4.19.264",
"versionType": "semver"
},
{
"lessThan": "5.4.231",
"status": "affected",
"version": "5.4.223",
"versionType": "semver"
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{
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"status": "affected",
"version": "6.0.7",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/core/net_namespace.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"lessThan": "6.1",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.272",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.231",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.166",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.91",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.272",
"versionStartIncluding": "4.19.264",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.231",
"versionStartIncluding": "5.4.223",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.91",
"versionStartIncluding": "5.15.77",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.9",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
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},
{
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"versionStartIncluding": "6.0.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix UaF in netns ops registration error path\n\nIf net_assign_generic() fails, the current error path in ops_init() tries\nto clear the gen pointer slot. Anyway, in such error path, the gen pointer\nitself has not been modified yet, and the existing and accessed one is\nsmaller than the accessed index, causing an out-of-bounds error:\n\n BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320\n Write of size 8 at addr ffff888109124978 by task modprobe/1018\n\n CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x6a/0x9f\n print_address_description.constprop.0+0x86/0x2b5\n print_report+0x11b/0x1fb\n kasan_report+0x87/0xc0\n ops_init+0x2de/0x320\n register_pernet_operations+0x2e4/0x750\n register_pernet_subsys+0x24/0x40\n tcf_register_action+0x9f/0x560\n do_one_initcall+0xf9/0x570\n do_init_module+0x190/0x650\n load_module+0x1fa5/0x23c0\n __do_sys_finit_module+0x10d/0x1b0\n do_syscall_64+0x58/0x80\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n RIP: 0033:0x7f42518f778d\n Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48\n 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff\n ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48\n RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139\n RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d\n RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003\n RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000\n R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000\n \u003c/TASK\u003e\n\nThis change addresses the issue by skipping the gen pointer\nde-reference in the mentioned error-path.\n\nFound by code inspection and verified with explicit error injection\non a kasan-enabled kernel."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable ops_init() path runs during register_pernet_subsys/device on module init, which an unprivileged local attacker can trigger via socket() autoload of protocol modules (e.g. AF_KCM/AF_RXRPC/AF_PHONET/AF_TIPC) or via CAP_NET_ADMIN in a user namespace loading tc act_* modules.\nAC:L - The attacker can induce the required net_assign_generic() ENOMEM failure by exhausting memory before triggering module autoload, and no victim-controlled or otherwise uncontrollable race/state is required beyond that attacker-driven condition.\nPR:L - No elevated host privileges are needed: a normal local user can call socket() to request_module net-pf-* modules that register pernet ops with id+size, or obtain CAP_NET_ADMIN only inside a user/net namespace to autoload tc action modules into the same path.\nUI:N - Exploitation requires no victim action; the attacker unilaterally creates sockets or netlink messages that cause the vulnerable registration error path to run.\nS:U - This is a host-kernel memory-corruption bug in netns registration; impact remains within the same kernel security authority with no VM/IOMMU/sandbox boundary crossed.\nC:H - The bug is an 8-byte out-of-bounds write into adjacent slab memory, which is memory corruption that can be shaped into an information-disclosure primitive under the scoring guidance for OOB writes.\nI:H - The slab out-of-bounds write of a NULL pointer into neighboring heap objects is an integrity-corrupting memory-safety violation that can be leveraged toward control-flow or object corruption, matching High for OOB write.\nA:H - The out-of-bounds write can crash the kernel (KASAN reports slab-out-of-bounds; without KASAN, adjacent-object corruption can oops/panic), so availability impact is High."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T09:12:19.715Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea"
},
{
"url": "https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e"
},
{
"url": "https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0"
},
{
"url": "https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4"
},
{
"url": "https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794"
},
{
"url": "https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1"
}
],
"title": "net: fix UaF in netns ops registration error path",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-52999",
"datePublished": "2025-03-27T16:43:32.497Z",
"dateReserved": "2025-03-27T16:40:15.742Z",
"dateUpdated": "2026-08-05T09:12:19.715Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
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(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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