{"id":"CVE-2026-95879","kind":"vulnerability","aliases":["CVE-2026-95879"],"related":[],"title":"Windows Graphics Kernel: out-of-bounds read lets a local user gain privileges","description":"Out-of-bounds read in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.","summary":"A flaw in the Windows Graphics Kernel lets a user who already has an account on the machine read memory past the end of a buffer. An attacker can use this to raise their privileges on that machine.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Graphics Kernel","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows"],"not_affected_if":["no-local-users","single-user-machine"],"how_to_check":"- Confirm the Windows build and patch level with `winver` or Settings > System > About.\n- Check Windows Update history for the Microsoft security update that lists CVE-2026-95879.","fix":null,"status":"open","published_at":"2026-11-10T19:21:40+00:00","first_seen_at":"2026-11-10T19:25:22+00:00","triaged_at":"2026-11-10T19:38:25+00:00","updated_at":"2026-11-10T20:30:15+00:00","category":"infrastructure","confidence":0.2,"triage":{"at":"2026-11-10T19:38:25Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Graphics Kernel: out-of-bounds read lets a local user gain privileges","impact":"high","summary":"A flaw in the Windows Graphics Kernel lets a user who already has an account on the machine read memory past the end of a buffer. An attacker can use this to raise their privileges on that machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains higher privileges, possibly SYSTEM level","analyst_note":"Find Microsoft's advisory for CVE-2026-95879 to confirm the fixed Windows builds and the patch KB.","how_to_check":"- Confirm the Windows build and patch level with `winver` or Settings > System > About.\n- Check Windows Update history for the Microsoft security update that lists CVE-2026-95879.","plain_action":"","product_name":"Windows Graphics Kernel","needs_analyst":true,"not_affected_if":["no-local-users","single-user-machine"],"who_is_affected":"Any Windows machine with the Graphics Kernel component is in scope, and the attacker must already be able to run code or log in locally. Shared servers, multi-user desktops and terminal hosts carry the most risk. Single-user machines where only trusted people log in can deprioritize it.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000719,"input_tokens":4494,"output_tokens":540,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find Microsoft's advisory for CVE-2026-95879 to confirm the fixed Windows builds and the patch KB.","search":"'-2026':16A,19A '-95879':17A,20A 'account':40B 'allow':73C 'alreadi':37B 'attack':53B,76C 'author':75C 'bound':7A,67C 'buffer':51B 'cve':15A,18A 'elev':78C 'end':48B 'flaw':27B 'gain':13A 'graphic':2A,31B,71C 'graphics':22A 'infrastructur':24B 'kernel':3A,23A,32B,72C 'let':9A,33B 'local':11A,80C 'machin':43B,63B 'memori':45B 'out-of-bound':4A,64C 'past':46B 'privileg':14A,60B,79C 'rais':58B 'read':8A,44B,68C 'use':55B 'user':12A,35B 'window':1A,25B,30B,70C 'windows':21A","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine with the Graphics Kernel component is in scope, and the attacker must already be able to run code or log in locally. Shared servers, multi-user desktops and terminal hosts carry the most risk. Single-user machines where only trusted people log in can deprioritize it.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":["graphicskernel","windowsgraphicskernel"],"ptokens":["graphics","kernel","windows"],"labels":["high","infrastructure","vendor","windows"],"campaign_type":null,"search_a":"'-2026':16A,19A '-95879':17A,20A 'bound':7A 'cve':15A,18A 'gain':13A 'graphic':2A 'graphics':22A 'kernel':3A,23A 'let':9A 'local':11A 'out-of-bound':4A 'privileg':14A 'read':8A 'user':12A 'window':1A 'windows':21A","search_b":"'account':40B 'alreadi':37B 'attack':53B 'buffer':51B 'end':48B 'flaw':27B 'graphic':31B 'infrastructur':24B 'kernel':32B 'let':33B 'machin':43B,63B 'memori':45B 'past':46B 'privileg':60B 'rais':58B 'read':44B 'use':55B 'user':35B 'window':25B,30B","search_c":"'allow':73C 'attack':76C 'author':75C 'bound':67C 'elev':78C 'graphic':71C 'kernel':72C 'local':80C 'out-of-bound':64C 'privileg':79C 'read':68C 'window':70C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:40+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-95879","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95879","severity":null,"published_at":"2026-11-10T19:21:40+00:00","modified_at":"2026-11-10T19:21:41+00:00","first_seen_at":"2026-11-10T19:25:22+00:00","fetched_at":"2026-11-10T19:25:22+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-95879:2668","url":null,"severity":null,"published_at":"2026-11-10T20:30:15+00:00","modified_at":"2026-11-10T20:30:15+00:00","first_seen_at":"2026-11-10T20:30:15+00:00","fetched_at":"2026-11-10T20:30:15+00:00","note":"Could not reach Microsoft's advisory: MSRC page is JS-only (WebFetch empty), NVD fetch empty, CVRF API too large, browser-cli 402, web-cli unavailable. No fixed build/KB confirmed; nothing verified. Needs MSRC page read via a working browser or search."}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}