cve.bz

CVE-2021-34557

4.6 mediumEPSS 0.5%

Medium (4.6). EPSS 0.5% chance of exploitation in the next 30 days.

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

Severity

CVSS 3.1

4.6 medium
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-31)
CWE
CWE-120
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON