SB20260828203 - Use-after-free in Linux kernel batman-adv
Published: August 28, 2026
Security Bulletin ID
SB20260828203
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-2026-80601)
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 attacker to cause a denial of service.
The vulnerability exists due to use-after-free in batman-adv gateway client handling in net/batman-adv/gateway_client.c when processing a crafted skb after buffer reallocation. A local attacker can trigger skb processing that uses stale buffer pointers to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2760b38222c8828b075802342fe3b91eb823d542
- https://git.kernel.org/stable/c/6c37f1166549c999ccd164b0cb6462d1ae68f8f6
- https://git.kernel.org/stable/c/77880a3be88d378d60cc1e8f8ec70430e2ed0518
- https://git.kernel.org/stable/c/916dac5f2944f63f07f7b501acbea6737dbbed0e
- https://git.kernel.org/stable/c/afac8096bde4948e3caa7e4dd733867cfbd3018e
- https://git.kernel.org/stable/c/b79884a5567bf788fb76c30832467cf6a56f3c0d
- https://git.kernel.org/stable/c/e3f4325e35dd6e76b80665f3510738ce34819753
- https://git.kernel.org/stable/c/e6b43acd34b219b807e65096ce207b087942779d