Wireshark up to 4.4.12/4.6.2 BLF File Parser out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.72

Summaryinfo

A vulnerability marked as critical has been reported in Wireshark up to 4.4.12/4.6.2. This impacts an unknown function of the component BLF File Parser. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2026-0961. The attack needs to be approached locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Wireshark up to 4.4.12/4.6.2. This affects an unknown code of the component BLF File Parser. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

BLF file parser crash in Wireshark 4.6.0 to 4.6.2 and 4.4.0 to 4.4.12 allows denial of service

It is possible to read the advisory at wireshark.org. This vulnerability is uniquely identified as CVE-2026-0961 since 01/14/2026. The exploitability is told 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 294997 (Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.4.13 or 4.6.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (294997), EUVD (EUVD-2026-2433) and CERT Bund (WID-SEC-2026-0116). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Open Source Wireshark

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

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

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 5.5
CNA Vector (GitLab): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 294997
Nessus Name: Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wireshark 4.4.13/4.6.3

Timelineinfo

01/14/2026 Advisory disclosed
01/14/2026 +0 days CVE reserved
01/14/2026 +0 days VulDB entry created
01/23/2026 +9 days VulDB entry last update

Sourcesinfo

Product: wireshark.org

Advisory: wireshark.org
Status: Confirmed

CVE: CVE-2026-0961 (🔒)
GCVE (CVE): GCVE-0-2026-0961
GCVE (VulDB): GCVE-100-341163
EUVD: 🔒
CERT Bund: WID-SEC-2026-0116 - Wireshark: Mehrere Schwachstellen erm&ouml;glichen Denial of Service

Entryinfo

Created: 01/14/2026 21:39
Updated: 01/23/2026 04:51
Changes: 01/14/2026 21:39 (64), 01/15/2026 07:41 (1), 01/16/2026 08:34 (7), 01/22/2026 03:38 (11), 01/23/2026 04:51 (2)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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