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DEBIAN-CVE-2026-56288

Type: advisorySource: OSV1 source record

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. An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service. This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313

Announced 9 Jul 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-56288

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-56288

patch

Source reference: /affected/0/package/name

Affected versions: 2.7.6-7
Source reference: /affected/0/versions
2.8-1
Source reference: /affected/0/versions
2.8-2
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

patch

Source reference: /affected/1/package/name

Affected versions: 2.8-2
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

patch

Source reference: /affected/2/package/name

Affected versions: 2.8-2
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "patch",
      "purl": "pkg:deb/debian/patch?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.7.6-7",
      "2.8-1",
      "2.8-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56288.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "patch",
      "purl": "pkg:deb/debian/patch?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.8-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56288.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "patch",
      "purl": "pkg:deb/debian/patch?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.8-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56288.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57953 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:33:19 GMT
Publisher date: Thu, 09 Jul 2026 11:16:40 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-56288 · Revision 1Source updated