High 7.0Published Apr 22, 2026

CVE-2026-35352uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition

Updated under an hour ago (Oct 28, 2026, 12:50 AM ET)

Does this affect you?

It affects Uutils coreutils. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Uutils coreutils

Exploited in the last 30 days

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: 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-367
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: canonical
NVD analysis: Modified
Record last updated: May 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Uutils coreutils uutils:coreutils (from the name)	All versions	CNA record
uutils coreutils uutils:coreutils	all versions	NVD

References

References

https://github.com/uutils/coreutils/issues/10020	issue-tracking, exploit, vendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/04/4
http://www.openwall.com/lists/oss-security/2026/05/04/5
http://www.openwall.com/lists/oss-security/2026/05/04/6

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.