CVE-2026-26967
Description
A flaw was found in PJSIP. A remote attacker could exploit a heap-based buffer overflow vulnerability in the H.264 unpacketizer by sending specially crafted Secure Real-time Transport Protocol (SRTP) packets. The unpacketizer fails to validate the bounds of a 2-byte Network Abstraction Layer (NAL) unit size field, which can lead to arbitrary code execution.
Statement
Exploiting this vulnerability requires that an attacker can induce the processing of untrusted content. If an application accepting input from remote sources processes H.264 content with PJSIP, this vulnerability could consequently be exploited remotely.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
Frequently Asked Questions
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