Integer overflow in Linux kernel - CVE-2026-52934

Vulnerability identifier: #VU135445

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-52934

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to corrupt kernel memory.

The vulnerability exists due to an integer overflow leading to an out-of-bounds write in batadv_tvlv_container_ogm_append() and batadv_tvlv_container_list_size() when processing registered TVLV containers. A local user can cause the accumulated TVLV size to exceed U16_MAX and trigger an undersized allocation to corrupt kernel memory.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

• https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482
• https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04
• https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d
• https://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557
• https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171
• https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae
• https://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919
• https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab

• Integer overflow in Linux kernel batman-adv
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia