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{"bugzilla": {"description": "chromium-browser: Out of bounds read in Media", "id": "2566300", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566300"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["Out of bounds read in Media in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)", "An out of bounds read flaw was found in the Media component of the Chromium browser.\nUpstream bug(s):\nhttps://issues.chromium.org/issues/565681451"], "mitigation": {"lang": "en:us", "value": "--- CME Mitigation Guidance (2026-11-04) ---\nDisclaimer: 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.\nThe highest-value action is to enforce strict buffer bounds checking on untrusted media content processing within the Media component: upgrade to Google Chrome 157.0.8103.38 (or the fixed Chromium builds), which prevents reading memory outside allocated buffer boundaries during media content processing, closing all 2 injection vectors (crafted HTML page, crafted media content). Until patched, this is a concern on users visiting untrusted or compromised web pages in Chromium-based browsers on any platform, so restrict user access to untrusted web pages and disallow loading untrusted media content. As a compensating measure, enable ASLR to randomize process memory layout and hinder target address calculation, enable NX/XD bit to prevent execution of instructions within media buffer allocations, enforce full RELRO and PIE to make global offset tables read-only and randomize executable layout, and enforce Control Flow Integrity and Shadow Call Stack to validate indirect call targets and block hijacked control-flow transfers. These controls limit blast radius and contain exploitation, but they do not fix the underlying out-of-bounds read defect \u2014 apply the upstream patch to fully remediate.\nHighest-impact CME: CME-101 ASLR (Address Space Layout Randomization) (medium)"}, "name": "CVE-2026-121184", "public_date": "2026-11-03T20:42:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-121184\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-121184\nhttps://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html\nhttps://issues.chromium.org/issues/565681451"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.", "threat_severity": "Moderate"}

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