Out-of-bounds write in Linux kernel - CVE-2026-99142

Vulnerability details

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.

Affected software

How to mitigate CVE-2026-99142

External References

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

Related Security Bulletins

• Out-of-bounds write in Linux kernel trace
• Debian update for linux