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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dash | No fix yet | — |
| Debian 13 | dash | No fix yet | — |
| Debian 12 | dash | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dash | No fix yet | — |
| Ubuntu 26.04 LTS | dash | No fix yet | — |
| Ubuntu 24.04 LTS | dash | No fix yet | — |
| Ubuntu 22.04 LTS | dash | No fix yet | — |
| Ubuntu 20.04 LTS | dash | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | dash | No fix yet | — |
| Ubuntu 16.04 LTS | dash | No fix yet | — |
| Ubuntu 14.04 LTS | dash | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-102473 vdb-entry
- RHBZ#2543005 issue-tracking