# CVE-2026-43280: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/xe: Add bounds check on pat_index to prevent...

CVE-2026-43280 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43280 (version 6.19.6-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-43280
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 6, 2026

## 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)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.6-1 | [DEBIAN-CVE-2026-43280](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43280.md) | May 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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