Off-by-One Leading to Out-of-Bounds Write in bzip2_CVE-2026-42250

5.1 / 10

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

Description

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

Basic Information

ID CVE-2026-42250

Source CERT-PL

Published May 28, 2026 at 13:15

Affected Product

Vendor bzip2

Product bzip2

Affected Versions bzip2 bzip2 0

CWE Classification

CWE-787

References

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    "lastseen": "",
    "description": "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",
    "published": "2026-05-28T13:15:19.660Z",
    "modified": "2026-05-28T13:15:19.660Z",
    "type": "cve",
    "title": "Off-by-One Leading to Out-of-Bounds Write in bzip2",
    "source": "CERT-PL",
    "references": "https://cert.pl/en/posts/2026/05/CVE-2026-42250/\nhttps://sourceware.org/bzip2/",
    "id": "CVE-2026-42250",
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