🛡️ CVE-2026-5405 — wireshark

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-5405 is classified as CWE-122: Heap-based Buffer Overflow. A write past the end of a heap allocation corrupts allocator metadata or neighbouring objects.

Affected software

CVE-2026-5405 is recorded against 1 package.

• wireshark (from 4.6.0 up to 4.6.5)

Timeline and source

Published on 1 May 2026 and last revised on 15 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

gitlab.com
www.wireshark.org
access.redhat.com
access.redhat.com
access.redhat.com
bugzilla.redhat.com
security.access.redhat.com

Other advisories for this package

wireshark has other advisories on record. If you are patching this one, these are worth checking on the same host:

• openSUSE-SU-2026:21534-1 (published 5 Aug 2026)
• openSUSE-SU-2026:11460-1 (published 5 Aug 2026)
• SUSE-SU-2026:3501-1 (published 5 Aug 2026)
• SUSE-SU-2026:2969-1 (published 14 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-122: Heap-based Buffer Overflow) in other software:

• CVE-2022-46290 (9.8 Critical, published 13 Jul 2026)
• CVE-2022-46289 (9.8 Critical, published 13 Jul 2026)
• CVE-2023-40889 (9.5 Critical, published 29 Jun 2026)
• CVE-2023-25668 (9.5 Critical, published 29 Jun 2026)
• CVE-2023-43688 (7.5 High, published 9 Jun 2026)
• CVE-2024-30045 (6.3 Medium, published 4 Sep 2025)
• CVE-2023-28905 (8.0 High, published 28 Jun 2025)
• CVE-2024-31580 (8.0 High, published 11 Jun 2025)

CVE-2026-5405 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References