CVE-2026-93167
kernel: csky: Fix a4/a5 restoration in syscall trace path
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel. When tracing system calls on C-SKY ABIv2, an issue in restoring register values (a4/a5) can lead to incorrect arguments being passed to certain system calls. This can cause traced applications to fail or behave unexpectedly, potentially resulting in a denial of service for the affected process.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-628 · Function Call with Incorrectly Specified Arguments