Vulnerability Description
In 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)
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.18, < 6.18.16 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4Patch
- https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7Patch
- https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818ddPatch
FAQ
What is CVE-2026-43280?
CVE-2026-43280 is a vulnerability with a CVSS score of 7.1 (HIGH). In 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...
How severe is CVE-2026-43280?
CVE-2026-43280 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43280?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.