SB20260816525 - Use-after-free in Linux kernel trace
Published: August 16, 2026
Security Bulletin ID
SB20260816525
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-72012)
CWE-ID: CWE-416 - Use After Free
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 a use-after-free in the osnoise tracer instance unregistration logic when unregistering an osnoise tracing instance while RCU readers are traversing the instance list. A local user can trigger instance unregistration to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/38366140dc8ee3568c7f0191d517e117963bd580
- https://git.kernel.org/stable/c/3c693635bb7b3a9b6645831a84fed2af46cdf249
- https://git.kernel.org/stable/c/dd0160a0842337f12e7694d68b184050afc6d3a4
- https://git.kernel.org/stable/c/fad36954b29592ce463254179c3043697678481f
- https://git.kernel.org/stable/c/fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a