CVE-2026-45990
Description
A flaw was found in the Linux kernel. This vulnerability, a type of memory corruption, occurs within the krealloc() and kvrealloc() memory reallocation functions. When memory objects are resized or moved, these functions can incorrectly calculate the amount of data to copy, leading to an out-of-bounds write. This could allow a local attacker to cause system instability or potentially execute arbitrary code with elevated privileges.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce 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.
