CVE-2026-112202
Description
A flaw was found in Imager::File::GIF. When processing consolidated GIF images, palette indices are read without proper bounds checking against the color table. A remote attacker could exploit this vulnerability by supplying a specially crafted GIF file to trigger an out-of-bounds memory read. Successful exploitation can result in information disclosure of adjacent process memory or cause a Denial of Service (DoS) by crashing the application.
Statement
This vulnerability is rated as having a Low severity because it requires the non-default gif_consolidate option to be explicitly enabled by an application processing untrusted GIF images. Under standard default reading operations, Imager does not invoke the affected consolidation logic. Furthermore, exploitation is limited to localized application crashes or disclosing adjacent heap memory, with no potential for arbitrary code execution or state modification.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
