bzip2 up to 1.0.8 bzip2recover out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in bzip2 up to 1.0.8. It has been classified as critical. Affected by this issue is some unknown functionality of the component bzip2recover. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2026-42250. The attack requires local access. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in bzip2 up to 1.0.8 and classified as problematic. Affected by this vulnerability is an unknown code block of the component bzip2recover. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

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 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67

The weakness was presented with AFINE Team. It is possible to read the advisory at cert.pl. This vulnerability is known as CVE-2026-42250 since 04/25/2026. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 318082 (Linux Distros Unpatched Vulnerability : CVE-2026-42250), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.0.9 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318082) and EUVD (EUVD-2026-32898). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318082
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-42250

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: bzip2 1.0.9

Timelineinfo

04/25/2026 CVE reserved
05/28/2026 +33 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
06/07/2026 +10 days VulDB entry last update

Sourcesinfo

Advisory: cert.pl
Organization: AFINE Team
Status: Confirmed

CVE: CVE-2026-42250 (🔒)
GCVE (CVE): GCVE-0-2026-42250
GCVE (VulDB): GCVE-100-366763
EUVD: 🔒

Entryinfo

Created: 05/28/2026 17:11
Updated: 06/07/2026 03:19
Changes: 05/28/2026 17:11 (67), 05/28/2026 18:39 (1), 06/01/2026 21:00 (2), 06/07/2026 03:19 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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