CVE-2026-99006 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of Linux kernel versions that may be affected by this vulnerability should assess their exposure and apply patches or updates as necessary.

Why it matters

CVE-2026-99006 is a vulnerability in the Linux kernel's drm/i915/gem component that can allow for a potential out-of-bounds access in the exec array boundary. Linux kernel maintainers and users should prioritize assessing exposure and applying patches to prevent potential out-of-bounds access.

• Verify Linux kernel versions and configurations for potential vulnerability
• Assess exposure of Linux kernel deployments to CVE-2026-99006
• Apply patches or updates provided by Linux kernel maintainers
• Monitor Linux kernel deployments for indicators of compromise

Technical summary

The Linux kernel's drm/i915/gem component is vulnerable to a potential out-of-bounds access in the exec array boundary. The issue arises during the execution of the eb_relocate_parse_slow() function, where it is possible to call kvfree() on entries outside the original exec array. This flaw occurs due to the incorrect usage of the incremented buffer count to release relocation pointers from the exec array via kvfree(), rather than using the original exec object count.

Defensive priority

Linux kernel maintainers and users should prioritize assessing exposure and applying patches to prevent potential out-of-bounds access.

Recommended defensive actions

• Assess exposure of Linux kernel deployments to CVE-2026-99006
• Verify inventory of Linux kernel versions and configurations for potential vulnerability
• Apply patches or updates provided by Linux kernel maintainers
• Monitor Linux kernel deployments for indicators of compromise
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information on the vulnerability. Supplemental sources include various Linux kernel Git references. Linux kernel maintainers and users should prioritize assessing exposure and applying patches to prevent potential out-of-bounds access. Evidence is limited to public CVE Program and NVD records. Defenders should verify Linux kernel versions, assess exposure, and apply patches or updates as necessary.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.