SB2026091880 - Use-after-free in Linux kernel bpf
Published: September 18, 2026
Security Bulletin ID
SB2026091880
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-2026-93137)
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 condition.
The vulnerability exists due to use-after-free in bpf_find_vma() when a BPF program accesses virtual memory area information for a foreign task. A local user can invoke bpf_find_vma() with a foreign task to trigger a use-after-free condition.
The foreign task must exit concurrently.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2b2a903bee56d312539046d9defa8023eec94760
- https://git.kernel.org/stable/c/47b079e2117a2ee52e21f8b72935900c702fc0b5
- https://git.kernel.org/stable/c/86d54cf069fc5ae2e111c87933bebf6eb527978e
- https://git.kernel.org/stable/c/8e1101fc4118019a69c96ced4aec93164f89cbd5
- https://git.kernel.org/stable/c/c7ad910e987008e125eeff448892e86852173384
- https://git.kernel.org/stable/c/db347840d6b6ee9bb9b8e4a985d4b4419f9f3200