CVE-2026-90339

A flaw was found in the Linux kernel's powerpc/syscall component. This vulnerability occurs when the system_call_exception() function incorrectly handles a sentinel value during syscall processing, particularly when security mechanisms like seccomp or ptrace intercept a syscall. This can lead to an injected return value being silently discarded or an error number being overwritten. Consequently, security policies enforced by seccomp or ptrace might be bypassed, potentially allowing a local attacker to achieve unintended system behavior or bypass security restrictions.

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.