CVE-2026-121074
Description
A memory corruption flaw was found in the GPU 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 within the GPU process: upgrade to Chromium 157.0.8103.38 (or the fixed Chromium builds), which corrects memory corruption in the GPU component triggered by malicious web content, closing crafted HTML page. Until patched, this is a concern on Chromium and Google Chrome deployments on any platform, so restrict browsing to trusted web pages and prevent user interaction with untrusted HTML content. As a compensating measure, randomize memory layout of the browser process using ASLR to hinder reliable code execution via corrupted GPU buffers, enforce NX/XD non-executable memory bits to prevent execution of injected code in writable GPU process data segments, enable full RELRO and PIE to protect read-only relocations and prevent GOT overwrite techniques during exploitation, apply kernel-level syscall filtering via seccomp to restrict available system calls and contain post-exploitation activity from the GPU process, enforce Arbitrary Code Guard with W^X page policies to block dynamic creation of executable memory pages, and deploy an EDR agent to monitor process activity and detect anomalous post-exploitation behavior or unexpected child processes spawned by the browser. These controls limit blast radius and contain exploitation, but they do not fix the underlying GPU memory corruption 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,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands; Modify Memory
This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. If the memory accessible by the attacker can be effectively controlled, it may be possible to execute arbitrary code, as with a standard buffer overflow. If the attacker can overwrite a pointer's worth of memory (usually 32 or 64 bits), they can alter the intended control flow by redirecting a function pointer to their own malicious code. Even when the attacker can only modify a single byte, arbitrary code execution can be possible. Sometimes this is because the same problem can be exploited repeatedly to the same effect. Other times it is because the attacker can overwrite security-critical application-specific data -- such as a flag indicating whether the user is an administrator.
Availability,Confidentiality
Technical Impact: Read Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory)
Out of bounds memory access will very likely result in the corruption of relevant memory, and perhaps instructions, possibly leading to a crash. Other attacks leading to lack of availability are possible, including putting the program into an infinite loop.
Confidentiality
Technical Impact: Read Memory
In the case of an out-of-bounds read, the attacker may have access to sensitive information. If the sensitive information contains system details, such as the current buffer's position in memory, this knowledge can be used to craft further attacks, possibly with more severe consequences.
Frequently Asked Questions
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