CVE-2026-35339Public exploit

False success via overwritten recursive chmod result

Published Apr 22, 2026 · Updated Apr 22, 2026

Incorrect return-value handling in uutils coreutils before 0.6.0 allows local users to mask failed recursive chmod operations. In Chmoder::chmod(), the recursive branch overwrites the running result with each walk_dir_with_context result instead of accumulating failures. A low-privileged local user who can influence a multi-target chmod -R invocation can make a later success hide an earlier permissions error, causing dependent scripts to continue while affected file permissions remain unchanged.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect return-value handling in uutils coreutils before 0.6.0 allows local users to mask failed recursive chmod operations. In Chmoder::chmod(), the recursive branch overwrites the running result with each walk_dir_with_context result instead of accumulating failures. A low-privileged local user who can influence a multi-target chmod -R invocation can make a later success hide an earlier permissions error, causing dependent scripts to continue while affected file permissions remain unchanged.

The record

CVE
CVE-2026-35339
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
uutils
Product
coreutils
Classifications
CWE-253, T1222.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

uutils · coreutilsversion=0 <0.6.0

Published CVSS scores

5.5Canonical Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-253Incorrect Check of Function Return Value
T1222.002Linux and Mac File and Directory Permissions

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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