SB20261023151 - Release of invalid pointer or reference in Linux kernel i915 gem driver

Description

This security bulletin contains information about 1 vulnerability.

1) Release of invalid pointer or reference (CVE-ID: CVE-2026-99006)

CWE-ID: CWE-763 - Release of invalid pointer or reference

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service through invalid kernel memory deallocation.

The vulnerability exists due to invalid pointer deallocation in the i915 driver's eb_relocate_parse_slow() function when relocation cleanup uses a buffer count increased by the command parser to access entries outside the original exec array. A local user can trigger this execution path to cause kvfree() to operate on pointers obtained from out-of-bounds entries, potentially corrupting kernel memory and crashing the system.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/152fb5083b9333a1cb8629572f9e0f276a404ba6
• https://git.kernel.org/stable/c/24c04e80c35ff36947366f6deafddb522eea080c
• https://git.kernel.org/stable/c/72d5cbb10d4916a3f8ef9da516c5c0634aca8439
• https://git.kernel.org/stable/c/b1c357131fc467c579f65e9a9d1fdc1a6273ae1d
• https://git.kernel.org/stable/c/ebe162db655881a38de43301151ff7ac940602b5