A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the install utility of uutils coreutils when using the -D flag. The command creates parent directories and subsequently performs a second path resolution to create the target file, neither of which is anchored to a directory file descriptor. An attacker with concurrent write access can replace a path component with a symbolic link between these operations, redirecting the privileged write to an arbitrary file system location.
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History
Wed, 22 Apr 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the install utility of uutils coreutils when using the -D flag. The command creates parent directories and subsequently performs a second path resolution to create the target file, neither of which is anchored to a directory file descriptor. An attacker with concurrent write access can replace a path component with a symbolic link between these operations, redirecting the privileged write to an arbitrary file system location. | |
| Title | uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race | |
| Weaknesses | CWE-367 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: canonical
Published:
Updated: 2026-04-22T16:08:17.812Z
Reserved: 2026-04-02T12:58:56.087Z
Link: CVE-2026-35356
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Status : Received
Published: 2026-04-22T17:16:38.130
Modified: 2026-04-22T17:16:38.130
Link: CVE-2026-35356
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