CVE-2026-9123: Heap buffer overflow in Chromecast
Chromium: CVE-2026-9122 Out of bounds read in GPU
Other sources
Heap buffer overflow in Chromecast in Google Chrome on Android, Linux, ChromeOS prior to 148.0.7778.179 allowed a local attacker to execute arbitrary code inside a sandbox via malicious network traffic. (Chromium security severity: Medium)
— NVD
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 148.0.7778.178 - Upgrade
Upgrade
Chromium (ChromeOS/Linux/Android GPU)to a version that resolves this vulnerability.Fixed in 148.0.7778.179
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2026-9123?
CVE-2026-9123 has a severity rating of high, with a CVSS score of 7.5.
How do I fix CVE-2026-9123?
To fix CVE-2026-9123, update Google Chrome or Microsoft Edge to version 148.0.7778.179 or later.
What type of vulnerability is CVE-2026-9123?
CVE-2026-9123 is a heap buffer overflow vulnerability.
Who is affected by CVE-2026-9123?
CVE-2026-9123 affects users of Google Chrome on Android, Linux, and ChromeOS, as well as Microsoft Edge.
What can an attacker do with CVE-2026-9123?
An attacker can execute arbitrary code inside a sandbox via malicious network traffic due to CVE-2026-9123.