CVE-2025-23395

Local root exploit via `logfile_reopen()` in screen 5.0.0 with setuid-root bit set

CVSS 7.3 HIGHEPSS 0.2%CWE-271

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

26 May 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Screen 5.0.0 when it runs with setuid-root privileges does not drop privileges while operating on a user supplied path. This allows unprivileged users to create files in arbitrary locations with `root` ownership, the invoking user's (real) group ownership and file mode 0644. All data written to the Screen PTY will be logged into this file, allowing to escalate to root privileges

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

screen

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References

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23395 https://www.openwall.com/lists/oss-security/2025/05/12/1