CVE-2026-53351 riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
A missing note type in RISC-V ptrace core dumps triggers a kernel warning, potentially causing system instability or crashes during core dump generation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53351?
CVE-2026-53351 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
Fixes a warning while dumping core:
[54983.546369][ C7] WARNING: [!note_name] fs/binfmt_elf.c:1771 at elf_core_dump+0x910/0xf68, CPU#7: abort01/31982
Which versions are affected by CVE-2026-53351?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53351?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-53351 being exploited?
There is no known exploitation of CVE-2026-53351 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-53351, GHSA-6c65-27vf-g68r, UBUNTU-CVE-2026-53351.