{"id":"CVE-2026-102473","state":"PUBLISHED","title":"Dash: dash: super-polynomial backtracking in pmatch when libc fnmatch is disabled","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.","publishedAt":"2026-09-29T09:22:54.336Z","updatedAt":"2026-09-30T20:11:10.442Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"redhat"},"assigner":"redhat","products":["Red Hat Red Hat Enterprise Linux 6"],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"dash","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]}],"references":["https://access.redhat.com/security/cve/CVE-2026-102473","https://bugzilla.redhat.com/show_bug.cgi?id=2543005"],"weaknesses":["CWE-1333"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102473.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102473","state":"PUBLISHED","datePublished":"2026-09-29T09:22:54.336Z","dateUpdated":"2026-09-30T20:11:10.442Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-09-29T08:38:18.889Z"},"containers":{"cna":{"title":"Dash: dash: super-polynomial backtracking in pmatch when libc fnmatch is disabled","descriptions":[{"lang":"en","value":"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":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"dash","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-102473","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543005","name":"RHBZ#2543005","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1333","description":"Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-09-29T09:22:54.336Z"},"datePublic":"2026-09-29T00:00:00.000Z","x_redhatCweChain":"CWE-1333: Inefficient Regular Expression Complexity","workarounds":[{"lang":"en","value":"Rebuild dash with --enable-fnmatch so pathname matching uses libc fnmatch. Until then, do not run dash globs, case, or ${var#pat} / ${var%pat} against attacker-controlled names with multi-star patterns. There is no upstream backtracking bound in the internal matcher."}],"timeline":[{"lang":"en","time":"2026-09-29T08:34:06.065Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-29T00:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-102473","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-30T19:42:25.405325Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T20:11:10.442Z"}}]}}}