CVE-2026-35341: A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing

Routine

HIGH 7.1MITIGATE

CVE-2026-35341 is a high-severity flaw (CVSS 7.1) affecting coreutils. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation for that path and continues to execute a follow-up set_permissions call. This results in the existing file's permissions being changed to the default mode (often 644 after umask), potentially exposing sensitive

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-732
Published	2026-04-22
Last modified	2026-10-26

Publisher (CNA): Canonical Ltd. · Vendor: uutils

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-22 17:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

uutils coreutils MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy coreutils || rpm -q coreutils || coreutils --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Downgrade not recommended

This is a core system component: downgrading can break the OS. Apply the distro update or the vendor mitigation.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35341?

coreutils: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-35341 being exploited?

CVE-2026-35341 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35341 affect?

CVE-2026-35341 affects coreutils. Severity is high (CVSS 7.1). A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation f

How urgent is CVE-2026-35341?

Priority 31/100. High severity; Public exploit reference

Related CVEs

CVE-2026-35364 MEDIUM 6.3 MITIGATE A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cro
CVE-2026-35380 MEDIUM 5.5 UPGRADE A logic error in the cut utility of uutils coreutils causes the program to incorrectly interpret the literal t
CVE-2026-35345 MEDIUM 5.3 MITIGATE A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents
CVE-2026-35358 MEDIUM 4.4 UPGRADE The cp utility in uutils coreutils, when performing recursive copies (-R), incorrectly treats character and bl
CVE-2026-35366 MEDIUM 4.4 UPGRADE The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte

References

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