Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when updating modules in persistent instances trace_module_record() walks ftrace_trace_arrays from the module notifier without trace_types_lock. A concurrent rmdir of an instance removes it from the list and frees it under that lock, so a module load or unload can walk into a freed trace_array.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund2 Nov 2026WID-SEC-2026-4302

  Linux Kernel: Multiple vulnerabilities allow an unspecified attack Translated from German

  Risk mediumCVE-2026-99237CVE-2026-99264CVE-2026-99220+50 more CVEs

[ References ]References

• git.kernel.org/stable/c/244c442f54601a24c86ad90572bf36fc3df41c5e
• git.kernel.org/stable/c/57408eac99b0d8a005796346d317d31f0ca4e07a
• git.kernel.org/stable/c/66877a312ae3c2c3d849e82e882f642ffd4ec3e2
• git.kernel.org/stable/c/dab2bd4d67ad5eaa95019a9511f8d379401b5021