{"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": "2026-04-22T16:07:54.366Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-35347", "lastModified": "2026-04-22T17:16:36.903", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 2.5, "source": "security@ubuntu.com", "type": "Secondary"}]}, "published": "2026-04-22T17:16:36.903", "references": [{"source": "security@ubuntu.com", "url": "https://github.com/uutils/coreutils/pull/9545"}, {"source": "security@ubuntu.com", "url": "https://github.com/uutils/coreutils/releases/tag/0.6.0"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}

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