CVE-2026-58826

Summary

A use-after-free vulnerability in the ksys_unshare function of fork.c allows an unprivileged local attacker to corrupt memory and escalate privileges without user interaction.

Exploitability

Exploitation requires local access and no additional privileges; the use-after-free is triggered by calling ksys_unshare, but the exact reliability is unclear due to lack of public exploit details.

Blast radius

Successful exploitation grants local privilege escalation with full system compromise (confidentiality, integrity, availability) and no user interaction required.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Apply the kernel patch released for CVE-2026-58826; if no fixed kernel version is published by the vendor, disable unshare-related syscalls via seccomp filters or upgrade to a patched kernel version as soon as one is available.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.