CVE-2026-98951
kernel: riscv: ptrace: Zero-initialize regset buffers before copyin
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's RISC-V architecture. When handling process tracing (ptrace) register set requests with shorter-than-expected data lengths, the kernel fails to initialize temporary stack buffers before copying user input. A local attacker with process tracing privileges can exploit this issue to leak sensitive kernel stack data into the target process or corrupt its execution state.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-908 · Use of Uninitialized Resource