CVE-2026-68765
Description
A flaw was found in hashcat. Attackers can exploit a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module by providing an oversized ninth hash field token. The module processes input up to 600 hexadecimal characters into a fixed 256-byte buffer without proper length validation. This can lead to heap memory corruption or memory access violations, potentially resulting in a denial of service or other unpredictable behavior.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
To mitigate this issue, users should avoid processing untrusted KeePass hash files with hashcat. When processing untrusted input is unavoidable, run hashcat within a sandboxed environment, such as a container or a dedicated virtual machine, to limit the potential impact of heap corruption or memory access violations on the host system. This operational control helps isolate the vulnerable process from critical system resources.
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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