CVE-2026-35352
highpriority · track · 0EPSS 0.001 · 4 %ileEUUSEPSS · scored 2026-10-27
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-9gh9-hwpr-rvqquutils coreutils has a Time-of-Check to Time-of-Use (TOCTOU) race condition2026-04-22ghsa · osvUS
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2026-35352cnnvd
- https://github.com/uutils/coreutils/issues/10020enisa_euvd
- http://www.openwall.com/lists/oss-security/2026/05/04/4nvd
- http://www.openwall.com/lists/oss-security/2026/05/04/5nvd
- http://www.openwall.com/lists/oss-security/2026/05/04/6nvd
- https://github.com/uutils/coreutils/issues/10020ExploitIssue TrackingVendor Advisorynvd
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