CVE-2026-77159

תיאור (מקור, אנגלית)

A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user.

מדדים

CVSS 3.1

5.5 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-4/10/2026

CWE

CWE-61

קישורים

• https://access.redhat.com/security/cve/CVE-2026-77159
• https://bugzilla.redhat.com/show_bug.cgi?id=2531811
• https://gitlab.com/libvirt/libvirt/-/work_items/909
• https://gitlab.com/libvirt/libvirt/-/work_items/909