CVE-2025-9810

TOCTOU race in Linenoise enables arbitrary file overwrite and permission changes

State: Published
Severity: 6.8 Medium
Published: Sep 1, 2025
Updated: Apr 22, 2026
Reserved: Sep 1, 2025

Description

TOCTOU in linenoiseHistorySave in linenoise allows local attackers to overwrite arbitrary files and change permissions via a symlink race between fopen("w") on the history path and subsequent chmod() on the same path.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L	CyberArk

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
linenoiseantirez	0Affected

References

https://github.com/antirez/linenoise/blob/master/linenoise.c#L1321
https://github.com/antirez/linenoise/pull/202
https://github.com/antirez/linenoise/blob/4111f1d6cd29e136b4e86a25d1dd859a1e00813b/linenoise.c#L1321
https://github.com/antirez/linenoise/commit/f2558e1e588b1ba384ec73a2cf5c9a46409753db

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