CVE-2026-102473
Dash: dash: super-polynomial backtracking in pmatch when libc fnmatch is disabled
- State
- Published
- Severity
- 5.5 Medium
- Published
- Sep 29, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 29, 2026
Description
A flaw was found in dash. When built without libc fnmatch, the internal pmatch() matcher implements * by unbounded recursion over candidate positions. A local user who can plant filenames, or otherwise feed that matcher, can make a short multi-star pattern such as *.*.*.*.*.tar.gz consume excessive CPU.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-1333 Inefficient Regular Expression Complexity
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 6Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-102473vdb-entry
- RHBZ#2543005issue-tracking
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