Race condition in Linux kernel - CVE-2026-93203

Vulnerability identifier: #VU150797

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93203

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to corrupt backbone gateway CRC values.

The vulnerability exists due to a race condition in batadv_bla_add_claim() when processing concurrent CLAIM frames for the same client. A remote attacker can send concurrent CLAIM frames to corrupt backbone gateway CRC values.

Linux kernel
Debian Linux
Ubuntu
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-azure-fde (Ubuntu package) - update to 5.15.0-1124.133
linux (Ubuntu package) - update to 7.0.0-42.42
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/08645ab95768b88e2ff85a89211994651710465b
• https://git.kernel.org/stable/c/1d390db003cbb52cdd86837608bff3794501a5ea
• https://git.kernel.org/stable/c/3d4a9ae2c69c0fe4c3c69587288241243bb7a39b
• https://git.kernel.org/stable/c/8bcfa58c4277bff1882a23547c37ab08aa1de12f
• https://git.kernel.org/stable/c/a3e07db74f22a85aeeb51c600da5c98b9cbca11f
• https://git.kernel.org/stable/c/ad982d925f00d860d2467811256ffadcccd9e4a7
• https://git.kernel.org/stable/c/d5b0e7574da5a485f4dbec32a15911900a4487c2
• https://git.kernel.org/stable/c/e54602d9e38db8573f2097d60c7ea8be0a5af1fa

• Race condition in Linux kernel batman-adv
• Debian update for linux
• Ubuntu update for linux-azure-fde
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more