Vulnerability-Lookup

CVE-2026-53910 (GCVE-0-2026-53910)

Vulnerability from cvelistv5 – Published: 2026-07-22 13:42 – Updated: 2026-07-27 10:58 X_Open Source Disputed

Title

Heap-based Buffer Overflow in GNU diffutils

Summary

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out‑of‑bounds writes during internal processing. An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815 NOTE: The project maintainers claim that this is not a security issue. They state that the worst outcome this issue can cause is a crash of diff and that it cannot be used to escalate privileges.

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 19:11 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

CERT-PL CNA under the ENISA root

CNA scorecard B 81/100 over 256 records in the last 180 days details

References

4 references

URL	Tags
https://cert.pl/en/posts/2026/07/CVE-2026-53910	third-party-advisory
https://git.savannah.gnu.org/cgit/diffutils.git/	product
https://cgit.git.savannah.gnu.org/cgit/diffutils.…	patch
https://cgit.git.savannah.gnu.org/cgit/diffutils.…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
GNU	diffutils	Affected: 0 , ≤ 3.12 (custom)	guessed

Date Public

2026-07-22 00:00

Credits

Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)

Show details on NVD website

JSON

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              "tags": [
                "patch"
              ],
              "url": "https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "tags": [
            "x_open-source",
            "disputed"
          ],
          "title": "Heap-based Buffer Overflow in GNU diffutils",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "assignerShortName": "CERT-PL",
        "cveId": "CVE-2026-53910",
        "datePublished": "2026-07-22T13:42:50.539Z",
        "dateReserved": "2026-06-11T07:44:52.179Z",
        "dateUpdated": "2026-07-27T10:58:52.287Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

RHSA-2026:45327

Vulnerability from csaf_redhat - Published: 2026-07-24 14:31 - Updated: 2026-09-08 02:25

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Low

Scope

1 vulnerability in this advisory, including CVE-2026-53910.

CVE-2026-53910

A flaw was found in the diff3 program in the diffutils package. When processing specially crafted diff output, a heap-based buffer overflow can occur due to multiple signed integer overflows in line-mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds, resulting in a denial of service or memory corruption.

5.3 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:45327

Open the full advisory

UBUNTU-CVE-2026-53910 (CVE-2026-53910)

Vulnerability from osv_ubuntu – Published: 2026-07-22 14:17 – Updated: 2026-08-31 19:57 – Source website

Details

Severity

2.1 (Low)


                    
                      CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-53910	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-53910	REPORT
	https://ubuntu.com/security/notices/USN-8692-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.3-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.3-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.3-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.2-8",
        "1:3.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.3-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.3-3ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.3-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.3-1",
        "1:3.3-2",
        "1:3.3-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.6-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.6-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.6-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.6-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.7-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.7-3ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.7-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.7-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.8-0ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.8-0ubuntu2.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.8-0ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.8-0ubuntu1",
        "1:3.8-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.10-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.10-1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.10-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.8-4",
        "1:3.10-1",
        "1:3.10-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "diffutils",
            "binary_version": "1:3.12-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "diffutils",
        "purl": "pkg:deb/ubuntu/diffutils@1:3.12-1ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.12-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:3.10-4",
        "1:3.12-1"
      ]
    }
  ],
  "aliases": [],
  "details": "diff3\u00a0tool from GNU diffutils\u00a0is vulnerable to a heap\u2011based buffer overflow due to multiple signed integer overflows in line\u2011mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out\u2011of\u2011bounds writes during internal processing. An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815 NOTE: The project maintainers claim that this is not a security issue. They state that the worst outcome this issue can cause is a crash of diff and that it cannot be used to escalate privileges.",
  "id": "UBUNTU-CVE-2026-53910",
  "modified": "2026-08-31T19:57:49Z",
  "published": "2026-07-22T14:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-53910"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53910"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8692-1"
    }
  ],
  "related": [
    "USN-8692-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-53910"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-53910 (GCVE-0-2026-53910)

RHSA-2026:45327

UBUNTU-CVE-2026-53910 (CVE-2026-53910)

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