TOCTOU race in Linenoise enables arbitrary file overwrite and permission changes

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Summary

CVECVE-2025-9810
StatePUBLISHED
AssignerCyberArk
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-01 19:15:32 UTC
Updated2026-04-22 16:16:52 UTC
DescriptionTOCTOU  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.

Risk And Classification

Primary CVSS: v3.1 5.8 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L

EPSS: 0.000120000 probability, percentile 0.016060000 (date 2026-04-22)

Problem Types: CWE-367 | CWE-367 CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.8MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
3.196148269-fe82-4198-b1bf-3a73ce8bc92eSecondary6.8MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
3.1CNACVSS6.8MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Antirez Linenoise - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Antirez Linenoise affected Not specified

References

ReferenceSourceLinkTags
github.com/antirez/linenoise/commit/f2558e1e588b1ba384ec73a2cf5c9a464097... af854a3a-2127-422b-91ae-364da2661108 github.com
github.com/antirez/linenoise/pull/202 96148269-fe82-4198-b1bf-3a73ce8bc92e github.com Issue Tracking, Third Party Advisory
github.com/antirez/linenoise/blob/master/linenoise.c 96148269-fe82-4198-b1bf-3a73ce8bc92e github.com Product
github.com/antirez/linenoise/blob/4111f1d6cd29e136b4e86a25d1dd859a1e0081... af854a3a-2127-422b-91ae-364da2661108 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: @disconnect3d (en)

CNA: Simcha Kosman (en)

Additional Advisory Data

Solutions

CNA: call fchmod() on the fd instead of chmod() on the path

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