Vulnerability-Lookup

GHSA-9R29-3VRX-4537

Vulnerability from github – Published: 2026-05-28 15:39 – Updated: 2026-05-28 18:30

Details

bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service).

This issue was fixed in bzip2 version 1.0.9

Severity

5.1 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-42250"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T14:16:19Z",
    "severity": "MODERATE"
  },
  "details": "bzip2 contains an off\u2011by\u2011one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out\u2011of\u2011bounds write to a global buffer, resulting in memory corruption and a crash (denial of service).\n\nThis issue was fixed in bzip2 version 1.0.9",
  "id": "GHSA-9r29-3vrx-4537",
  "modified": "2026-05-28T18:30:29Z",
  "published": "2026-05-28T15:39:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42250"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/en/posts/2026/05/CVE-2026-42250"
    },
    {
      "type": "WEB",
      "url": "https://inbox.sourceware.org/bzip2-devel/20260528145407.293768-1-mark@klomp.org"
    },
    {
      "type": "WEB",
      "url": "https://sourceware.org/bzip2"
    },
    {
      "type": "WEB",
      "url": "https://sourceware.org/cgit/bzip2/commit/?id=35d122a3df8b0cc4082a4d89fdc6ee99f375fe67"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-42250 (GCVE-0-2026-42250)

Vulnerability from cvelistv5 – Published: 2026-05-28 13:15 – Updated: 2026-05-28 17:01 X_Open Source

Title

Off-by-One Leading to Out-of-Bounds Write in bzip2

Summary

Severity

5.1 (Medium)


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

CWE

CWE-787 - Out-of-bounds Write

Assigner

CERT-PL

References

4 references

URL	Tags
https://cert.pl/en/posts/2026/05/CVE-2026-42250/	third-party-advisory
https://sourceware.org/bzip2/	product
https://inbox.sourceware.org/bzip2-devel/20260528…	vendor-advisory
https://sourceware.org/cgit/bzip2/commit/?id=35d1…	patch

Impacted products

1 product

Vendor	Product	Version
bzip2	bzip2	Affected: 0 , ≤ 1.0.8 (semver) Unaffected: 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67 (custom)

Credits

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

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42250",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T14:22:49.264231Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T14:23:00.571Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
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          "repo": "https://gitlab.com/federicomenaquintero/bzip2",
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            }
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        }
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          "value": "Micha\u0142 Majchrowicz (AFINE Team)"
        },
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          "lang": "en",
          "type": "finder",
          "value": "Marcin Wyczechowski (AFINE Team)"
        }
      ],
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        },
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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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9R29-3VRX-4537

CVE-2026-42250 (GCVE-0-2026-42250)

Tags

Sightings

Nomenclature