SB2026092553 - Double free in Linux kernel cachefiles
Published: September 25, 2026
Security Bulletin ID
SB2026092553
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) Double free (CVE-ID: CVE-2026-93810)
CWE-ID: CWE-415 - Double 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 cause a double free.
The vulnerability exists due to a double fput in error handling in cachefiles_create_tmpfile() when the cache does not support read_iter and write_iter. A local user can trigger this error-handling path to cause a double free.
Remediation
Install update from vendor's website.