CVE-2026-35358

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.

PUBLISHED Reserved 2026-04-02 | Published 2026-04-22 | Updated 2026-04-22 | Assigner canonical

Problem types

CWE-706: Use of Incorrectly-Resolved Name or Reference

Product status

Credits

Zellic finder

References

github.com/uutils/coreutils/issues/9746 exploit

github.com/uutils/coreutils/pull/11163 patch

github.com/uutils/coreutils/issues/9746 issue-tracking

github.com/uutils/coreutils/releases/tag/0.7.0 vendor-advisory

cve.org (CVE-2026-35358)

nvd.nist.gov (CVE-2026-35358)

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