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CVE-2026-35364

uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition

6.3 MediumFix available

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.09%Up 0.1 points since Apr 23, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.3

uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
CVE-2026-35364
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
EUVDEUVD-2026-25010 6.3

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
EUVD-2026-25010
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-m976-87wm-48fm 6.3

uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
GHSA-m976-87wm-48fm
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
NVD 6.3

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
CVE-2026-35364
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
OSVDEBIAN-CVE-2026-35364 6.3

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
DEBIAN-CVE-2026-35364
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVGHSA-m976-87wm-48fm 6.3

uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
GHSA-m976-87wm-48fm
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-367
Updated
2026-11-02
OSVUBUNTU-CVE-2026-35364 6.3

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

Record
UBUNTU-CVE-2026-35364
CVSS 3.1
6.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
coreutils
crates.io
through 0.8.0 None known
rust-coreutils
Debian:12
All versions, plus listed versions
0.0.17-20.0.17-30.0.17-40.0.17-50.0.17-6
Show 39 moreShow less
0.0.19-10.0.19-20.0.19-30.0.20-10.0.21-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-20.0.26-10.0.26-20.0.26-30.0.26-40.0.26-50.0.27-10.0.27-20.0.27-30.0.30-10.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-10.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3
None known
rust-coreutils
Debian:13
All versions, plus listed versions
0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-1
Show 14 moreShow less
0.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3
None known
rust-coreutils
Debian:14
before 0.9.0-1, plus listed versions
0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.6.0-1
Show 7 moreShow less
0.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-6
0.9.0-1
rust-coreutils
Ubuntu:24.04:LTS
All versions, plus listed versions
0.0.20-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-2
None known
rust-coreutils
Ubuntu:25.10
All versions, plus listed versions
0.0.30-10.0.30-20.0.30-2ubuntu20.1.0-0ubuntu10.1.0+git20250711.2ba3a33-0ubuntu1
Show 11 moreShow less
0.1.0+git20250711.2ba3a33-0ubuntu20.1.0+git20250711.2ba3a33-0ubuntu30.1.0+git20250711.2ba3a33-0ubuntu40.1.0+git20250801.cf79675-0ubuntu10.1.0+git20250813.4af2a84-0ubuntu20.1.0+git20250813.4af2a84-0ubuntu40.1.0+git20250813.4af2a84-0ubuntu60.1.0+git20250813.4af2a84-0ubuntu70.2.2-0ubuntu10.2.2-0ubuntu20.2.2-0ubuntu2.1
None known
rust-coreutils
Ubuntu:26.10
All versions, plus listed versions
0.8.0-0ubuntu30.8.0-0ubuntu40.9.0-2ubuntu20.10.0-1ubuntu10.10.0-1ubuntu2
Show 5 moreShow less
0.10.0-1ubuntu30.11.0-2ubuntu10.11.0-2ubuntu20.12.0-1ubuntu10.12.0-1ubuntu2
None known
rust-coreutils
Ubuntu:26.04:LTS
All versions, plus listed versions
0.2.2-0ubuntu20.2.2-0ubuntu40.5.0-0ubuntu10.5.0-0ubuntu20.6.0-0ubuntu10.7.0-0ubuntu10.8.0-0ubuntu30.10.0-1ubuntu2~26.04.1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35364 is a medium vulnerability (CVSS 6.3) in Uutils Coreutils, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.09%, the 0th percentile. Fixed in rust-coreutils 0.9.0-1.

References

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