Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-53351

Vulnerability identifier: #VU136694

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-53351

CWE-ID: CWE-703

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 handling of core dump note types in riscv ptrace REGSET_CFI support when dumping a core file. A local user can trigger a core dump to cause a denial of service.

The issue is evidenced by a kernel warning in elf_core_dump on RISC-V systems.

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

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-31.31~24.04.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12, 7.0.0-1012.12~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13

• https://git.kernel.org/stable/c/08200bef0983ffed039ab399df0cba8d900ce5fc
• https://git.kernel.org/stable/c/e3573f739e3dadab57ec80488d07e05c8f6e82d3

• Improper Check or Handling of Exceptional Conditions in Linux kernel riscv kernel
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-gcp-7.0