CVE-2026-35371: The id utility in uutils coreutils exhibits incorrect behavior in its "pretty print" output when the real UID

Routine

LOW 3.3MITIGATE

CVE-2026-35371 is a low-severity flaw (CVSS 3.3) affecting coreutils. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The id utility in uutils coreutils exhibits incorrect behavior in its "pretty print" output when the real UID and effective UID differ. The implementation incorrectly uses the effective GID instead of the effective UID when performing a name lookup for the effective user. This results in misleading diagnostic output that can cause automated scripts or system administrators to make incorrect decisions regarding file permissions or access control.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-451
Published	2026-04-22
Last modified	2026-10-25

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

Last updated 2026-10-25 · 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
2026-10-25 23:10 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-2026-35371?

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

Is CVE-2026-35371 being exploited?

CVE-2026-35371 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-2026-35371 affect?

CVE-2026-35371 affects coreutils. Severity is low (CVSS 3.3). The id utility in uutils coreutils exhibits incorrect behavior in its "pretty print" output when the real UID and effective UID differ. The implementation incorrectly uses the effective GID instead of the effective UID when performing a nam

How urgent is CVE-2026-35371?

Priority 17/100. Public exploit reference

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References

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