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EUVD-2026-344887

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:58

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.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:58:29.543167+00:00",
  "id": "EUVD-2026-344887"
}

CVE-2022-50315 (GCVE-0-2022-50315)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:46 – Updated: 2026-08-05 08:58

Title

ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS

Summary

In the Linux kernel, the following vulnerability has been resolved: ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS UBSAN complains about array-index-out-of-bounds: [ 1.980703] kernel: UBSAN: array-index-out-of-bounds in /build/linux-9H675w/linux-5.15.0/drivers/ata/libahci.c:968:41 [ 1.980709] kernel: index 15 is out of range for type 'ahci_em_priv [8]' [ 1.980713] kernel: CPU: 0 PID: 209 Comm: scsi_eh_8 Not tainted 5.15.0-25-generic #25-Ubuntu [ 1.980716] kernel: Hardware name: System manufacturer System Product Name/P5Q3, BIOS 1102 06/11/2010 [ 1.980718] kernel: Call Trace: [ 1.980721] kernel: <TASK> [ 1.980723] kernel: show_stack+0x52/0x58 [ 1.980729] kernel: dump_stack_lvl+0x4a/0x5f [ 1.980734] kernel: dump_stack+0x10/0x12 [ 1.980736] kernel: ubsan_epilogue+0x9/0x45 [ 1.980739] kernel: __ubsan_handle_out_of_bounds.cold+0x44/0x49 [ 1.980742] kernel: ahci_qc_issue+0x166/0x170 [libahci] [ 1.980748] kernel: ata_qc_issue+0x135/0x240 [ 1.980752] kernel: ata_exec_internal_sg+0x2c4/0x580 [ 1.980754] kernel: ? vprintk_default+0x1d/0x20 [ 1.980759] kernel: ata_exec_internal+0x67/0xa0 [ 1.980762] kernel: sata_pmp_read+0x8d/0xc0 [ 1.980765] kernel: sata_pmp_read_gscr+0x3c/0x90 [ 1.980768] kernel: sata_pmp_attach+0x8b/0x310 [ 1.980771] kernel: ata_eh_revalidate_and_attach+0x28c/0x4b0 [ 1.980775] kernel: ata_eh_recover+0x6b6/0xb30 [ 1.980778] kernel: ? ahci_do_hardreset+0x180/0x180 [libahci] [ 1.980783] kernel: ? ahci_stop_engine+0xb0/0xb0 [libahci] [ 1.980787] kernel: ? ahci_do_softreset+0x290/0x290 [libahci] [ 1.980792] kernel: ? trace_event_raw_event_ata_eh_link_autopsy_qc+0xe0/0xe0 [ 1.980795] kernel: sata_pmp_eh_recover.isra.0+0x214/0x560 [ 1.980799] kernel: sata_pmp_error_handler+0x23/0x40 [ 1.980802] kernel: ahci_error_handler+0x43/0x80 [libahci] [ 1.980806] kernel: ata_scsi_port_error_handler+0x2b1/0x600 [ 1.980810] kernel: ata_scsi_error+0x9c/0xd0 [ 1.980813] kernel: scsi_error_handler+0xa1/0x180 [ 1.980817] kernel: ? scsi_unjam_host+0x1c0/0x1c0 [ 1.980820] kernel: kthread+0x12a/0x150 [ 1.980823] kernel: ? set_kthread_struct+0x50/0x50 [ 1.980826] kernel: ret_from_fork+0x22/0x30 [ 1.980831] kernel: </TASK> This happens because sata_pmp_init_links() initialize link->pmp up to SATA_PMP_MAX_PORTS while em_priv is declared as 8 elements array. I can't find the maximum Enclosure Management ports specified in AHCI spec v1.3.1, but "12.2.1 LED message type" states that "Port Multiplier Information" can utilize 4 bits, which implies it can support up to 16 ports. Hence, use SATA_PMP_MAX_PORTS as EM_MAX_SLOTS to resolve the issue. BugLink: https://bugs.launchpad.net/bugs/1970074

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f70bd4339cb68bc7e…
https://git.kernel.org/stable/c/da2ea4a961d9f89ed…
https://git.kernel.org/stable/c/67a00c299c5c14381…
https://git.kernel.org/stable/c/383b7c50f5445ff8d…
https://git.kernel.org/stable/c/303d0f761431d848d…
https://git.kernel.org/stable/c/8fbe13de1cc7cef25…
https://git.kernel.org/stable/c/d6314d5f68764550c…
https://git.kernel.org/stable/c/1e41e693f458eef2d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < f70bd4339cb68bc7e206af4c922bc0d249244403 (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < da2ea4a961d9f89ed248734e7032350c260dc3a3 (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < 67a00c299c5c143817c948fbc7de1a2fa1af38fb (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < 383b7c50f5445ff8dbbf03080905648d6980c39d (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < 303d0f761431d848dd8d7ff9fd9b8c101879cabe (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < 8fbe13de1cc7cef2564be3cbf60400b33eee023b (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < d6314d5f68764550c84d732ce901ddd3ac6b415f (git) Affected: 18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee , < 1e41e693f458eef2d5728207dbd327cd3b16580a (git)
Linux	Linux	Affected: 2.6.27 Unaffected: 0 , < 2.6.27 (semver) Unaffected: 4.9.332 , ≤ 4.9.* (semver) Unaffected: 4.14.298 , ≤ 4.14.* (semver) Unaffected: 4.19.264 , ≤ 4.19.* (semver) Unaffected: 5.4.221 , ≤ 5.4.* (semver) Unaffected: 5.10.152 , ≤ 5.10.* (semver) Unaffected: 5.15.76 , ≤ 5.15.* (semver) Unaffected: 6.0.6 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ata/ahci.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f70bd4339cb68bc7e206af4c922bc0d249244403",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "da2ea4a961d9f89ed248734e7032350c260dc3a3",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "67a00c299c5c143817c948fbc7de1a2fa1af38fb",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "383b7c50f5445ff8dbbf03080905648d6980c39d",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "303d0f761431d848dd8d7ff9fd9b8c101879cabe",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "8fbe13de1cc7cef2564be3cbf60400b33eee023b",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "d6314d5f68764550c84d732ce901ddd3ac6b415f",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            },
            {
              "lessThan": "1e41e693f458eef2d5728207dbd327cd3b16580a",
              "status": "affected",
              "version": "18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/ata/ahci.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "lessThan": "2.6.27",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.332",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.298",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.264",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.76",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.332",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.298",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.264",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.221",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.152",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.76",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.6",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS\n\nUBSAN complains about array-index-out-of-bounds:\n[ 1.980703] kernel: UBSAN: array-index-out-of-bounds in /build/linux-9H675w/linux-5.15.0/drivers/ata/libahci.c:968:41\n[ 1.980709] kernel: index 15 is out of range for type \u0027ahci_em_priv [8]\u0027\n[ 1.980713] kernel: CPU: 0 PID: 209 Comm: scsi_eh_8 Not tainted 5.15.0-25-generic #25-Ubuntu\n[ 1.980716] kernel: Hardware name: System manufacturer System Product Name/P5Q3, BIOS 1102 06/11/2010\n[ 1.980718] kernel: Call Trace:\n[ 1.980721] kernel: \u003cTASK\u003e\n[ 1.980723] kernel: show_stack+0x52/0x58\n[ 1.980729] kernel: dump_stack_lvl+0x4a/0x5f\n[ 1.980734] kernel: dump_stack+0x10/0x12\n[ 1.980736] kernel: ubsan_epilogue+0x9/0x45\n[ 1.980739] kernel: __ubsan_handle_out_of_bounds.cold+0x44/0x49\n[ 1.980742] kernel: ahci_qc_issue+0x166/0x170 [libahci]\n[ 1.980748] kernel: ata_qc_issue+0x135/0x240\n[ 1.980752] kernel: ata_exec_internal_sg+0x2c4/0x580\n[ 1.980754] kernel: ? vprintk_default+0x1d/0x20\n[ 1.980759] kernel: ata_exec_internal+0x67/0xa0\n[ 1.980762] kernel: sata_pmp_read+0x8d/0xc0\n[ 1.980765] kernel: sata_pmp_read_gscr+0x3c/0x90\n[ 1.980768] kernel: sata_pmp_attach+0x8b/0x310\n[ 1.980771] kernel: ata_eh_revalidate_and_attach+0x28c/0x4b0\n[ 1.980775] kernel: ata_eh_recover+0x6b6/0xb30\n[ 1.980778] kernel: ? ahci_do_hardreset+0x180/0x180 [libahci]\n[ 1.980783] kernel: ? ahci_stop_engine+0xb0/0xb0 [libahci]\n[ 1.980787] kernel: ? ahci_do_softreset+0x290/0x290 [libahci]\n[ 1.980792] kernel: ? trace_event_raw_event_ata_eh_link_autopsy_qc+0xe0/0xe0\n[ 1.980795] kernel: sata_pmp_eh_recover.isra.0+0x214/0x560\n[ 1.980799] kernel: sata_pmp_error_handler+0x23/0x40\n[ 1.980802] kernel: ahci_error_handler+0x43/0x80 [libahci]\n[ 1.980806] kernel: ata_scsi_port_error_handler+0x2b1/0x600\n[ 1.980810] kernel: ata_scsi_error+0x9c/0xd0\n[ 1.980813] kernel: scsi_error_handler+0xa1/0x180\n[ 1.980817] kernel: ? scsi_unjam_host+0x1c0/0x1c0\n[ 1.980820] kernel: kthread+0x12a/0x150\n[ 1.980823] kernel: ? set_kthread_struct+0x50/0x50\n[ 1.980826] kernel: ret_from_fork+0x22/0x30\n[ 1.980831] kernel: \u003c/TASK\u003e\n\nThis happens because sata_pmp_init_links() initialize link-\u003epmp up to\nSATA_PMP_MAX_PORTS while em_priv is declared as 8 elements array.\n\nI can\u0027t find the maximum Enclosure Management ports specified in AHCI\nspec v1.3.1, but \"12.2.1 LED message type\" states that \"Port Multiplier\nInformation\" can utilize 4 bits, which implies it can support up to 16\nports. Hence, use SATA_PMP_MAX_PORTS as EM_MAX_SLOTS to resolve the\nissue.\n\nBugLink: https://bugs.launchpad.net/bugs/1970074"
        }
      ],
      "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 OOB is reached through AHCI enclosure-management paths on systems with a SATA port multiplier (common on NAS/DAS and eSATA setups). A local attacker triggers it via world-readable sysfs (em_message) and normal ATA/PMP command processing, without needing network access.\nAC:L - Once an AHCI host with enclosure management and a PMP is present, the out-of-bounds em_priv[link-\u003epmp] access is deterministic on PMP attach, LED sysfs reads, port resume, and I/O\u2014no race or other attacker-uncontrollable condition is required.\nPR:L - em_message is S_IRUGO, so an unprivileged local user can force OOB reads of adjacent kernel heap via ahci_led_show for PMP port indices \u003e= 8. Port resume and related EM paths that write past em_priv[] also do not require root capabilities beyond normal local access.\nUI:N - Exploitation does not need a victim to open a file or mount anything; attaching/operating the PMP and reading host sysfs attributes is sufficient, and the bug also fires from kernel EH/resume context without user interaction.\nS:U - Impact is confined to the host kernel\u2019s memory and control flow (heap OOB in ahci_port_priv). There is no VM/hypervisor escape or other cross-authority boundary crossing.\nC:H - ahci_led_show and related EM paths read em_priv[link-\u003epmp] past the 8-slot array into adjacent heap and return those values to userspace, enabling disclosure of kernel memory; heap corruption from the write paths can further yield arbitrary read primitives.\nI:H - For PMP indices \u003e= 8, ahci_init_sw_activity performs OOB writes (including timer_setup of a timer_list) into memory past em_priv[], and ahci_sw_activity/ahci_activity_store can likewise corrupt adjacent heap\u2014classic primitives for control-flow hijacking.\nA:H - Out-of-bounds heap reads/writes and corrupted timer_list state can oops/panic the kernel; the same paths run in SCSI error-handler/resume context where memory corruption reliably threatens system availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:58:09.941Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f70bd4339cb68bc7e206af4c922bc0d249244403"
        },
        {
          "url": "https://git.kernel.org/stable/c/da2ea4a961d9f89ed248734e7032350c260dc3a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/67a00c299c5c143817c948fbc7de1a2fa1af38fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/383b7c50f5445ff8dbbf03080905648d6980c39d"
        },
        {
          "url": "https://git.kernel.org/stable/c/303d0f761431d848dd8d7ff9fd9b8c101879cabe"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fbe13de1cc7cef2564be3cbf60400b33eee023b"
        },
        {
          "url": "https://git.kernel.org/stable/c/d6314d5f68764550c84d732ce901ddd3ac6b415f"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e41e693f458eef2d5728207dbd327cd3b16580a"
        }
      ],
      "title": "ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50315",
    "datePublished": "2025-09-15T14:46:10.177Z",
    "dateReserved": "2025-09-15T14:18:36.813Z",
    "dateUpdated": "2026-08-05T08:58:09.941Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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EUVD-2026-344887

CVE-2022-50315 (GCVE-0-2022-50315)

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Nomenclature

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