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CVE-2026-98951

kernel: riscv: ptrace: Zero-initialize regset buffers before copyin

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Severity

Low

Red Hat Product Security

3.3

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 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE-908 · Use of Uninitialized Resource