Wireshark SBC Codec Crash DoS CVE-2026-5403 (4.4.0-4.4.14, 4.6.0-4.6.4)
CVE-2026-5403 Published on April 30, 2026

Heap-based Buffer Overflow in Wireshark
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

NVD

Vulnerability Analysis

CVE-2026-5403 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().


Products Associated with CVE-2026-5403

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Wireshark
 

Affected Versions

Wireshark Foundation Wireshark: