SB20261029164 - Out-of-bounds write in Linux kernel trace

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-99142)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to corrupt kernel memory, potentially causing a denial of service.

The vulnerability exists due to an out-of-bounds write in the Linux kernel tracing predicate_parse() function when processing opening parentheses in tracing filter expressions. A local privileged user can submit a crafted filter expression that causes an operator stack push beyond the last allocated entry to corrupt kernel memory, potentially causing a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/75e894f92417390f0ef44fd350f2d3634c784876
• https://git.kernel.org/stable/c/a866a8a753922cdf7710b8eb3f686dc0efc06505
• https://git.kernel.org/stable/c/c47a7b11bcb3d45e29723afcf6336866476b1d08