SB20260928297 - Use-after-free in Linux kernel trace
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928297
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-97919)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free read.
The vulnerability exists due to an incorrect reference-counting order in event_hist_trigger_named_init() when initialization of a named histogram trigger fails because alloc_hist_pad() cannot allocate. A local user can cause initialization to fail and subsequently look up the trigger by name to trigger a use-after-free read.
Remediation
Install update from vendor's website.