CVE-2026-3949
Description
A flaw was found in libheif. This vulnerability allows a local attacker to trigger an out-of-bounds read by manipulating the size argument in the vvdec_push_data2 function. This could lead to a denial of service (DoS).
Statement
This is a LOW impact vulnerability in libheif affecting Red Hat Community Projects. A local attacker can trigger an out-of-bounds read by manipulating arguments to the vvdec_push_data2 function, potentially leading to a denial of service. Exploitation requires local access to the system.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of a program'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 program into an infinite loop.
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