Improper resource shutdown or release in Linux kernel - CVE-2026-72228

Vulnerability identifier: #VU143365

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-72228

CWE-ID: CWE-404

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• 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

• Improper resource shutdown or release in Linux kernel batman-adv
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0