Improper control of a resource through its lifetime in Linux kernel - CVE-2026-72231

Vulnerability identifier: #VU143354

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-2026-72231

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to improper state management in batadv_send_tt_request() in the batman-adv translation table component when handling translation table requests after send buffer allocation failure. A local attacker can trigger repeated translation table requests to cause a denial of service.

The issue can lead to request storms because information about a pending translation table request is lost after a failed send attempt.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-nvidia-tegra (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-nvidia-tegra (Ubuntu package) - update to 6.8.0-1036.39+1
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/067e413eec2e63c2996909ef55214b3a0eda0be7
• https://git.kernel.org/stable/c/21c44a6895f41df811d1c91d10eea194dda2b345
• https://git.kernel.org/stable/c/27c7d40008231ae4140d35501b60087a9de2d2c3
• https://git.kernel.org/stable/c/5e46c76d9a5062212c4c5f642a5549fd9c057f8a
• https://git.kernel.org/stable/c/6055695ea40c64a47e00742c12c99b1a33b4daed
• https://git.kernel.org/stable/c/6a65ac8a81e903bb4b555c1d13532f5cb0167a4a
• https://git.kernel.org/stable/c/716f434eb35869e130424331584a91fbb729b9bd
• https://git.kernel.org/stable/c/aba1cf21954e64c36afb966b754adad2b0b8aa48

• Improper control of a resource through its lifetime 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-nvidia-tegra
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0