The cp utility in uutils coreutils, when performing recursive copies (-R), incorrectly treats character and block device nodes as stream sources rather than preserving them. Because the implementation reads bytes into regular files at the destination instead of using mknod, device semantics are destroyed (e.g., /dev/null becomes a regular file). This behavior can lead to runtime denial of service through disk exhaustion or process hangs when reading from unbounded device nodes.
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History
Wed, 22 Apr 2026 18:15:00 +0000
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ssvc
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Wed, 22 Apr 2026 16:30:00 +0000
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| Description | The cp utility in uutils coreutils, when performing recursive copies (-R), incorrectly treats character and block device nodes as stream sources rather than preserving them. Because the implementation reads bytes into regular files at the destination instead of using mknod, device semantics are destroyed (e.g., /dev/null becomes a regular file). This behavior can lead to runtime denial of service through disk exhaustion or process hangs when reading from unbounded device nodes. | |
| Title | uutils coreutils cp Semantic Loss and Potential Denial of Service with -R via Device Node Stream Reading | |
| Weaknesses | CWE-706 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: canonical
Published:
Updated: 2026-04-22T17:56:03.840Z
Reserved: 2026-04-02T12:58:56.087Z
Link: CVE-2026-35358
Updated: 2026-04-22T17:52:59.367Z
Status : Awaiting Analysis
Published: 2026-04-22T17:16:38.393
Modified: 2026-04-22T21:23:52.620
Link: CVE-2026-35358
No data.
OpenCVE Enrichment
Updated: 2026-04-22T18:15:15Z