{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56288", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-06-20T10:58:09.261Z", "datePublished": "2026-07-09T09:29:07.947Z", "dateUpdated": "2026-07-09T09:29:07.947Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-07-09T09:29:07.947Z"}, "title": "NULL Pointer Dereference in GNU patch", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference", "type": "CWE"}]}], "affected": [{"vendor": "GNU", "product": "patch", "repo": "https://cgit.git.savannah.gnu.org/cgit/patch.git/", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "2.8.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing.\nAn attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service.\n\n\n\nThis issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313", "supportingMedia": [{"type": "text/html", "base64": false, "value": "GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing.<br>An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service.<br><br><p>This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313</p>"}]}], "tags": ["x_open-source"], "references": [{"url": "https://cert.pl/en/posts/2026/07/CVE-2026-56288", "tags": ["third-party-advisory"]}, {"url": "https://cgit.git.savannah.gnu.org/cgit/patch.git/", "tags": ["product"]}, {"url": "https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=e6d6a4e021660679d7fc9150f981d4920f722313", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 4.6, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Micha\u0142 Majchrowicz (AFINE Team)", "type": "finder"}, {"lang": "en", "value": "Marcin Wyczechowski (AFINE Team)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.8.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "patch", "source": "cna", "vendor": "GNU"}, "product": "patch", "vendor": "gnu"}], "created": "2026-07-09T11:30:16.756153+00:00", "updated": "2026-07-09T11:30:16.756171+00:00", "vendors": ["gnu", "gnu$PRODUCT$patch"]}