CVE-2026-33633
Description
A flaw was found in Kitty, a cross-platform GPU based terminal. A remote attacker, by sending a specially crafted APC graphics protocol command with a large PNG payload to the terminal's standard input (stdin), could trigger a heap buffer overflow in the load_image_data() function. This vulnerability allows the attacker to crash the terminal, leading to a Denial of Service (DoS), and potentially execute arbitrary code, achieving Remote Code Execution (RCE).
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.
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
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