CVE-2026-5403 Details
Description
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
A heap buffer overflow vulnerability has been identified in the SBC audio codec of Wireshark versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14. This vulnerability allows for a denial-of-service condition and potentially arbitrary code execution. The issue arises in the 'codec_sbc_decode()' function, where a fixed-size output buffer is allocated but not properly managed during the decoding of RTP packets. When an RTP packet contains more than approximately 256 SBC frames, the decoded output exceeds the buffer size, leading to a heap buffer overflow. This vulnerability is present on all platforms where 'libsbc' is installed and the SBC codec plugin is compiled.
Users are advised to upgrade to Wireshark versions 4.6.5, 4.4.15 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 1, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-5403 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2464271 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5403.json | redhat-SADP | |
| https://gitlab.com/wireshark/wireshark/-/issues/21103 | [email protected] | ExploitIssue TrackingThird Party Advisory |
| https://www.wireshark.org/security/wnpa-sec-2026-16.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | redhat-SADP |
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wireshark wireshark | >= 4.4.0, < 4.4.15 >= 4.6.0, < 4.6.5 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | Initial Analysis | [email protected] |
| May 1, 2026 | New CVE Received | [email protected] |