GHSA-CMXM-M5W5-F84Q
Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise
When user provides a bogus pat_index value through the madvise IOCTL, the xe_pat_index_get_coh_mode() function performs an array access without validating bounds. This allows a malicious user to trigger an out-of-bounds kernel read from the xe->pat.table array.
The vulnerability exists because the validation in madvise_args_are_sane() directly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without first checking if pat_index is within [0, xe->pat.n_entries).
Although xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug builds, it still performs the unsafe array access in production kernels.
v2(Matthew Auld) - Using array_index_nospec() to mitigate spectre attacks when the value is used
v3(Matthew Auld) - Put the declarations at the start of the block
(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)
{
"affected": [],
"aliases": [
"CVE-2026-43280"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T12:16:49Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise\n\nWhen user provides a bogus pat_index value through the madvise IOCTL, the\nxe_pat_index_get_coh_mode() function performs an array access without\nvalidating bounds. This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe-\u003epat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args-\u003epat_index.val) without\nfirst checking if pat_index is within [0, xe-\u003epat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)",
"id": "GHSA-cmxm-m5w5-f84q",
"modified": "2026-05-08T15:31:19Z",
"published": "2026-05-06T12:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43280"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- 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.