SB20260928280 - Signed to Unsigned Conversion Error in Linux kernel trace

Description

This security bulletin contains information about 1 vulnerability.

1) Signed to Unsigned Conversion Error (CVE-ID: CVE-2026-97920)

CWE-ID: CWE-195 - Signed to Unsigned Conversion Error

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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.

The vulnerability exists due to a signed-to-unsigned conversion error in the print_entries() cleanup path when reading the hist file of a trigger while histogram statistics allocation fails. A local user can read the hist file of a trigger with a .percent value to cause a denial of service.

The affected code path is not reachable in mainline while .percent and .graph modifiers are rejected for values.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/06f5634ec5584954177f9a22e36b3bfb398a971b
• https://git.kernel.org/stable/c/17e87ce55f877efff1b08fe509e8bf91378cbbc9
• https://git.kernel.org/stable/c/9bd8321f5370295d1ae96dd17d43be3c9edd441b
• https://git.kernel.org/stable/c/c80b2a8067d58ff7d268ceef781c68b37a16c321