SB2026081615 - Improper access control in Linux kernel x86 kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Improper access control (CVE-ID: CVE-2026-72357)

CWE-ID: CWE-284 - Improper Access Control

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.

The vulnerability exists due to improper resource access in __in_uprobe_trampoline in arch/x86/kernel/uprobes.c when checking whether an instruction pointer is in an uprobe trampoline during uprobe unregister and optimization handling. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs because the check uses the tracer context rather than the traced process context for VMA lookup.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/169328645663bae30e9abad4012d52441e085a71
• https://git.kernel.org/stable/c/1acddd3e22dd6912dd5d54f80462405a1f1e6bae
• https://git.kernel.org/stable/c/c9170c83b0e0fc2065a4c2bca5bf1f90c5880156