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Fencer Vulns
medium 5.5

CVE-2026-0961 json

Out-of-bounds Write in Wireshark

published 2026-01-14 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2433

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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

Patch / fix

  • Wireshark Foundation Wireshark 4.4.13, 4.6.3
  • wireshark Debian 13 4.4.13-0+deb13u1
  • wireshark Debian 14 4.6.3-1

debian advisories DEBIAN-CVE-2026-0961

  • wireshark SLE Module for Desktop Applications 15 SP7, SLE Module for Basesystem 15 SP7 4.6.4-150700.21.8.1
  • libvirt SLE Module for Server Applications 15 SP7, SLE Module for Basesystem 15 SP7 11.0.0-150700.4.19.1
  • wireshark SLES for SAP applications 16.0, SLES 16.0 4.4.13-160000.1.1

suse advisories SUSE-SU-2026:1169-1SUSE-SU-2026:20222-1

  • wireshark openSUSE Leap 16.0 4.4.13-160000.1.1
  • wireshark openSUSE Tumbleweed 4.6.3-1.1

opensuse advisories openSUSE-SU-2026:20151-1openSUSE-SU-2026:10056-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-0961 updated cvss 5.5

Wireshark: Wireshark: Denial of Service vulnerability in BLF file parser

  • Red Hat Enterprise Linux 6 wireshark, wireshark-gnome Red Hat Enterprise Linux 7 wireshark, wireshark-gnome Red Hat Enterprise Linux 8 wireshark, wireshark-cli Red Hat Enterprise Linux 9 wireshark, wireshark-cli Red Hat Enterprise Linux 10 wireshark
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.com https://gitlab.com/wireshark/wireshark/-/issues/20880 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Wireshark Foundation Wireshark

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.