SB2026052993 - Improper resource shutdown or release in Linux kernel tracepoint_add_func()

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-46196)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to improper resource shutdown or release in tracepoint_add_func() when handling tracepoint registration failures after invoking ext->regfunc(). A local user can trigger a func_add() failure during probe installation to cause a denial of service.

For syscall tracepoints, the issue can leave syscall tracing state enabled and impose persistent syscall entry and exit overhead until reboot.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/247ed8a969f981bfba3112fd4bb441eaa6cef59c
• https://git.kernel.org/stable/c/2c5b8eeea006eb694c81631cd5713d494b80be90
• https://git.kernel.org/stable/c/342829e042ac00f3d68d442ea92873fb6683f494
• https://git.kernel.org/stable/c/7bcadb3c2bc1cf60690e931aadd35fb7bd646a49
• https://git.kernel.org/stable/c/fad217e16fded7f3c09f8637b0f6a224d58b5f2e