01 Record

CVE-2026-5405

Heap-based Buffer Overflow in Wireshark

HighPUBLISHEDCNA: GitLab

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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02 Description

Heap-based Buffer Overflow in Wireshark

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 5.2% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-26.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-30 23:03Z6 MO AGO

Last updated

2026-07-15 00:43Z3 MO AGO

Reserved

2026-04-02

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

CWE-122Heap-based Buffer OverflowVariant
CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

b1997df8628b462aa8760788293eb43e957388d3a6cce08ca4314ee2936304dd

05 Affected products

VendorProductVersionsPlatforms

Wireshark FoundationWireshark4.6.0 to < 4.6.5, 4.4.0 to < 4.4.15—

06 References

www.wireshark.orghttps://www.wireshark.org/security/wnpa-sec-2026-17.html
gitlab.comGitLab Issue #21105https://gitlab.com/wireshark/wireshark/-/issues/21105issue-trackingpermissions-required
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-5405vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2464273https://bugzilla.redhat.com/show_bug.cgi?id=2464273issue-trackingx_refsource_REDHAT
security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5405.jsonx_sadp-csaf-vex
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:26182vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:20600vendor-advisoryx_refsource_REDHAT

07 Remediation

Upgrade to version 4.6.5 or above

08 Fixed in

AlmaLinux 10

wireshark
Fixed in 1:4.4.2-10.el10_2
wireshark-cli
Fixed in 1:4.4.2-10.el10_2
wireshark-devel
Fixed in 1:4.4.2-10.el10_2

CloudLinux 10

wireshark
Fixed in 1:4.4.2-10.el10_2
wireshark-cli
Fixed in 1:4.4.2-10.el10_2
wireshark-devel
Fixed in 1:4.4.2-10.el10_2

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Debian 12

wireshark
Fixed in 4.0.17-0+deb12u3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

wireshark
Fixed in 4.4.15-0+deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

wireshark
Fixed in 4.6.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.