{"id":"CVE-2026-121143","kind":"vulnerability","aliases":["CVE-2026-121143"],"related":[],"title":"Chrome: uninitialized GPU memory lets a compromised renderer read outside sandbox","description":"Uninitialized resource in GPU in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome before 157.0.8103.38 has an uninitialized resource bug in its GPU component. A remote attacker who already controls the renderer process can use a crafted HTML page to read memory outside the sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","mobile","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:23+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","triaged_at":"2026-11-03T21:24:35+00:00","updated_at":"2026-11-03T21:24:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:24:35Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: uninitialized GPU memory lets a compromised renderer read outside sandbox","impact":"medium","summary":"Google Chrome before 157.0.8103.38 has an uninitialized resource bug in its GPU component. A remote attacker who already controls the renderer process can use a crafted HTML page to read memory outside the sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","mobile"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads process memory outside the sandbox after renderer compromise","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`\n- unknown for any other check","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Desktop and mobile Chrome installs before 157.0.8103.38 are affected. The attack needs a renderer compromise first, so it is chained with another flaw; sources do not say which, so unknown for chained details.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000656,"input_tokens":4110,"output_tokens":489,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121143':14A,17A '-2026':13A,16A '157.0.8103.38':26B,66C 'allow':67C 'alreadi':40B 'attack':38B,70C 'browser':18B 'bug':31B 'chrome':1A,19B,24B,63C 'chromium':88C 'compon':35B 'compromis':7A,73C 'control':41B 'craft':48B,85C 'cve':12A,15A 'desktop':20B 'googl':23B,62C 'gpu':3A,34B,60C 'high':91C 'html':49B,86C 'let':5A 'memori':4A,53B,79C 'mobil':21B 'outsid':10A,54B,80C 'page':50B,87C 'prior':64C 'process':44B,76C 'read':9A,52B,78C 'remot':37B,69C 'render':8A,43B,75C 'resourc':30B,58C 'runtim':22B 'sandbox':11A,56B,82C 'secur':89C 'sever':90C 'uniniti':2A,29B,57C 'use':46B 'via':83C","nicknames":[],"mitigations":[],"who_affected":"Desktop and mobile Chrome installs before 157.0.8103.38 are affected. The attack needs a renderer compromise first, so it is chained with another flaw; sources do not say which, so unknown for chained details.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","high","mobile","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:23+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121143","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121143","severity":null,"published_at":"2026-11-03T21:17:23+00:00","modified_at":"2026-11-03T21:17:23+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","fetched_at":"2026-11-03T21:19:22+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}