Improper initialization in Linux kernel - CVE-2026-93058

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper initialization handling in msm_ringbuffer_new() and msm_ringbuffer_destroy() when scheduler initialization fails before completion. A local user can initiate ring-buffer creation that encounters a scheduler initialization failure, causing cleanup to invoke scheduler teardown on a partially initialized scheduler to cause a denial of service.

Affected software

How to mitigate CVE-2026-93058

External References

• https://git.kernel.org/stable/c/09b360eb6ce345996a30fad8c86e9df80f41cd7e
• https://git.kernel.org/stable/c/d43e1bbfd43458b9242806eec77ea3b032134baf
• https://git.kernel.org/stable/c/e2332abed2a4d3caa59052095dc16e4ce44791ea

Related Security Bulletins

• Improper initialization in Linux kernel drm msm driver