CVE-2026-5403
Heap-based Buffer Overflow in Wireshark
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
SBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution
| CWE | CWE-122 |
| Vendor | wireshark foundation |
| Product | wireshark |
| Published | Apr 30, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Wireshark Foundation / Wireshark
4.6.0 < 4.6.5 4.4.0 < 4.4.15
References
wireshark.org: https://www.wireshark.org/security/wnpa-sec-2026-16.html gitlab.com: https://gitlab.com/wireshark/wireshark/-/issues/21103 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-5403 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2464271 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5403.json
Credits
Duc Anh Nguyen