SB20260816301 - Improper resource shutdown or release in Linux kernel batman-adv
Published: August 16, 2026
Security Bulletin ID
SB20260816301
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) Improper resource shutdown or release (CVE-ID: CVE-2026-72228)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
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 improper resource shutdown or release in batman-adv fragmentation handling in net/batman-adv/fragmentation.c when linearizing packets with a frag_list before splitting them. A local user can trigger a linearization failure with a crafted packet state to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/353d2c1d5492e53ae34f490a84494124dc3d3531
- https://git.kernel.org/stable/c/4f3bf293f7662500142234ae6f23725953690bc9
- https://git.kernel.org/stable/c/777a88256d6f70672116e53400659cc417e1feaa
- https://git.kernel.org/stable/c/a90f4fff9025371bce5371daa610af957de8dd6a
- https://git.kernel.org/stable/c/c1b28432fd6345e0d2308f39c507ed5750c265d2
- https://git.kernel.org/stable/c/d2148aeee93197ccf821114489775132f28eebf5
- https://git.kernel.org/stable/c/db3c700826e8126fbdaa83468a9c4ee4ee65319f
- https://git.kernel.org/stable/c/e59b1960f71521ce4eb4397c4e82f5285601ab57