{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35347","assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","state":"PUBLISHED","assignerShortName":"canonical","dateReserved":"2026-04-02T12:58:56.087Z","datePublished":"2026-04-22T16:07:54.366Z","dateUpdated":"2026-04-22T18:11:31.441Z"},"containers":{"cna":{"title":"uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation","affected":[{"vendor":"Uutils","product":"coreutils","platforms":["Linux","Unix","macOS"],"collectionURL":"https://github.com/uutils","packageName":"coreutils","repo":"https://github.com/uutils/coreutils","versions":[{"status":"affected","lessThan":"0.6.0","version":"0","versionType":"semver"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-20","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130: Excessive Allocation"}]}],"descriptions":[{"lang":"en","value":"The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero."}],"references":[{"url":"https://github.com/uutils/coreutils/pull/9545","tags":["patch","issue-tracking"]},{"url":"https://github.com/uutils/coreutils/releases/tag/0.6.0","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW","baseSeverity":"MEDIUM","baseScore":4.4,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"}}],"credits":[{"lang":"en","value":"Zellic","type":"finder"}],"source":{"discovery":"EXTERNAL"},"providerMetadata":{"orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","shortName":"canonical","dateUpdated":"2026-04-22T16:07:54.366Z"}},"adp":[{"references":[{"url":"https://github.com/uutils/coreutils/pull/9545","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T18:11:26.303416Z","id":"CVE-2026-35347","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-22T18:11:31.441Z"}}]}}