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CVE Vulnerability Details :

CVE-2026-42250

PUBLISHED

More Info Official Page

Assigner-CERT-PL

Assigner Org ID-4bb8329e-dd38-46c1-aafb-9bf32bcb93c6

Published At-28 May, 2026 | 13:15

Updated At-28 May, 2026 | 14:23

▼CVE Numbering Authority (CNA)

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

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

Affected Products

Vendor

bzip2

Product

bzip2

Repo

https://gitlab.com/federicomenaquintero/bzip2

Default Status

unaffected

Versions

Affected

From 0 before 1.0.9 (semver)

Problem Types

Type	CWE ID	Description
CWE	CWE-787	CWE-787 Out-of-bounds Write

Type: CWE

CWE ID: CWE-787

Description: CWE-787 Out-of-bounds Write

Metrics

Version	Base score	Base severity	Vector
4.0	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

Version: 4.0

Base score: 5.1

Base severity: MEDIUM

Vector:

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

Credits

finder

Michał Majchrowicz (AFINE Team)

finder

Marcin Wyczechowski (AFINE Team)

References

Hyperlink	Resource
https://cert.pl/en/posts/2026/05/CVE-2026-42250/	third-party-advisory
https://sourceware.org/bzip2/	product

Hyperlink: https://cert.pl/en/posts/2026/05/CVE-2026-42250/

Resource:

third-party-advisory

Hyperlink: https://sourceware.org/bzip2/

Resource:

product

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

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Affected

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Replaced By

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References

Affected Products

Metrics

Metrics Other Info

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Solutions

Configurations

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Exploits

Credits

Timeline

Replaced By

Rejected Reason

References