{"id":"CVE-2026-40660","kind":"vulnerability","aliases":["CVE-2026-40660"],"related":[],"title":"AMD Compressonator SDK: heap over-read lets a local user leak memory","description":"A heap-based out-of-bounds (OOB) read vulnerability in the AMD Compressonator SDK could allow an attacker with local access to read out-of-bounds heap memory, potentially resulting in information disclosure or application crash.","summary":"The AMD Compressonator SDK reads past the end of a heap buffer. A local attacker can read nearby heap memory or crash the application that uses it.","severity":"medium","cvss":5.2,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["amd-compressonator","c++","package","windows"],"not_affected_if":["sdk-not-used"],"how_to_check":"- Check whether the AMD Compressonator SDK is present in your build or dependencies.\n- Confirm the installed SDK version against the advisory; the sources do not give affected version ranges.","fix":null,"status":"open","published_at":"2026-11-03T15:17:39+00:00","first_seen_at":"2026-11-03T15:22:02+00:00","triaged_at":"2026-11-03T15:24:42+00:00","updated_at":"2026-11-03T15:24:42+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T15:24:42Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"AMD Compressonator SDK: heap over-read lets a local user leak memory","impact":"low","summary":"The AMD Compressonator SDK reads past the end of a heap buffer. A local attacker can read nearby heap memory or crash the application that uses it.","audience":"developers","category":"package","nicknames":[],"who_cares":["amd-compressonator","c++","windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Heap memory leaks or the application crashes.","analyst_note":"","how_to_check":"- Check whether the AMD Compressonator SDK is present in your build or dependencies.\n- Confirm the installed SDK version against the advisory; the sources do not give affected version ranges.","plain_action":"","needs_analyst":false,"not_affected_if":["sdk-not-used"],"who_is_affected":"Teams that compile or ship applications linking the AMD Compressonator SDK, particularly those processing untrusted texture or image input on a machine where local users are present. The sources do not name affected versions or specific entry points, so systems without the SDK can skip it.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000632,"input_tokens":4111,"output_tokens":441,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-40660':16A,19A 'access':74C 'allow':69C 'amd':1A,21B,27B,65C 'amd-compresson':20B 'applic':49B,89C 'attack':40B,71C 'base':55C 'bound':59C,80C 'buffer':37B 'c':23B 'compresson':2A,22B,28B,66C 'could':68C 'crash':47B,90C 'cve':14A,17A 'disclosur':87C 'end':33B 'heap':4A,36B,44B,54C,81C 'heap-bas':53C 'inform':86C 'leak':12A 'let':8A 'local':10A,39B,73C 'memori':13A,45B,82C 'nearbi':43B 'oob':60C 'out-of-bound':56C,77C 'over-read':5A 'packag':24B 'past':31B 'potenti':83C 'read':7A,30B,42B,61C,76C 'result':84C 'sdk':3A,29B,67C 'use':51B 'user':11A 'vulner':62C 'window':25B","nicknames":[],"mitigations":[],"who_affected":"Teams that compile or ship applications linking the AMD Compressonator SDK, particularly those processing untrusted texture or image input on a machine where local users are present. The sources do not name affected versions or specific entry points, so systems without the SDK can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["amdcompressonator","c","medium","package","windows"],"first_public_at":"2026-11-03T15:17:39+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"psirt@amd.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-40660","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40660","severity":null,"published_at":"2026-11-03T15:17:39+00:00","modified_at":"2026-11-03T15:17:39+00:00","first_seen_at":"2026-11-03T15:22:02+00:00","fetched_at":"2026-11-03T15:22:02+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"}