SB20260928293 - Time-of-check Time-of-use (TOCTOU) Race Condition in Linux kernel accel ivpu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-97916)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause an out-of-bounds memory access.

The vulnerability exists due to a time-of-check to time-of-use race condition in fw_log_print_buffer() in the Intel VPU firmware log handling code when the NPU firmware modifies shared tracing log metadata after validation. A local user can cause the firmware-controlled log header size or log size values to change between validation and use to cause an out-of-bounds memory access.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0724afc55c77c36c7feb9a7264b02aa7593c5c2d
• https://git.kernel.org/stable/c/40868f80a89199630b03d4457876f9a1feba0660
• https://git.kernel.org/stable/c/8ec3d6972f1440fae6c8dadd1859892775208759
• https://git.kernel.org/stable/c/b1555f63ee1a680f280bc18e8dac416f250e2ec3