CVE-2026-121201
Description
An use after free flaw was found in the Animation component of the Chromium browser.
Upstream bug(s):
Statement
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Mitigation
--- CME Mitigation Guidance (2026-11-04) ---
Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.
The highest-value action is to enforce Control Flow Integrity and Shadow Call Stack to validate indirect call targets and prevent control-flow hijacking caused by corrupted vtable or function pointers in the Animation component: upgrade to Google Chrome 157.0.8103.38 (or the fixed Chromium builds), which resolves the use-after-free memory corruption flaw in the browser Animation component, closing crafted HTML page. Until patched, this is a concern on Chromium users navigating untrusted or compromised web pages across any supported platform, so restrict web browsing to trusted internal destinations and block navigation to untrusted HTML pages. As a compensating measure, randomize renderer process memory layout via ASLR to prevent predictable target addressing, enforce non-executable permissions on heap and data pages via NX/XD bit to block arbitrary shellcode execution, harden binary layout with full RELRO and PIE to prevent Global Offset Table overwrites, restrict renderer process filesystem access using Landlock LSM to contain code execution within the sandbox, and monitor endpoints with EDR agents to detect anomalous post-exploitation behavior and unauthorized child process creation. These controls limit blast radius and contain exploitation, but they do not fix the underlying use-after-free defect — apply the upstream patch to fully remediate.
Highest-impact CME: CME-113 Control Flow Integrity (CFI / Shadow Call Stack) (high)
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory
The use of previously freed memory may corrupt valid data, if the memory area in question has been allocated and used properly elsewhere.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If chunk consolidation occurs after the use of previously freed data, the process may crash when invalid data is used as chunk information.
Confidentiality
Technical Impact: Read Memory
Read operations on freed memory can sometimes leak sensitive information instead of causing a crash
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If malicious data is entered before chunk consolidation can take place, it may be possible to take advantage of a write-what-where primitive to execute arbitrary code. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.
Frequently Asked Questions
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