{"id":"CVE-2026-112010","kind":"vulnerability","aliases":["CVE-2026-112010"],"related":[],"title":"smpeg: crafted MPEG file underflows packet size and crashes the application","description":"smpeg through 2.0.0 contains an integer underflow vulnerability in stream_header() in MPEGsystem.cpp that allows attackers to wrap packet_size by declaring an undersized packet length. Attackers can supply a crafted MPEG file opened via SMPEG_new, SMPEG_new_rwops or SMPEG_new_data to trigger a reachable assertion or out-of-bounds copy, crashing the application.","summary":"smpeg, an MPEG decoding library, has an integer underflow in stream_header() in MPEGsystem.cpp where a crafted packet length wraps packet_size. A crafted MPEG file opened through SMPEG_new, SMPEG_new_rwops or SMPEG_new_data can trigger a reachable assertion or out-of-bounds copy that crashes the application.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["c-cpp","media-playback","package","smpeg"],"not_affected_if":["no-untrusted-mpeg-input"],"how_to_check":"- Check whether the application links smpeg, for example with `ldd` on the binary or by searching the project for `SMPEG_new`\n- unknown whether a version is fixed, since the sources do not name one","fix":"- unknown: the sources do not name a fixed smpeg version or a patch\n- Until a fix is available, only open MPEG files from trusted sources with smpeg","status":"open","published_at":"2026-10-18T12:17:13+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","triaged_at":"2026-10-25T03:45:04+00:00","updated_at":"2026-10-25T03:45:04+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:45:04Z","model":"claude-haiku-5-5","output":{"fix":"- unknown: the sources do not name a fixed smpeg version or a patch\n- Until a fix is available, only open MPEG files from trusted sources with smpeg","reach":"unknown","title":"smpeg: crafted MPEG file underflows packet size and crashes the application","impact":"low","summary":"smpeg, an MPEG decoding library, has an integer underflow in stream_header() in MPEGsystem.cpp where a crafted packet length wraps packet_size. A crafted MPEG file opened through SMPEG_new, SMPEG_new_rwops or SMPEG_new_data can trigger a reachable assertion or out-of-bounds copy that crashes the application.","category":"package","nicknames":[],"who_cares":["smpeg","c-cpp","media-playback"],"confidence":0.6,"needs_auth":"no","worst_case":"Application crashes on a crafted MPEG file","analyst_note":"Confirm the fixed smpeg version and whether the out-of-bounds copy could lead beyond a crash; check the NVD entry and upstream smpeg repository.","how_to_check":"- Check whether the application links smpeg, for example with `ldd` on the binary or by searching the project for `SMPEG_new`\n- unknown whether a version is fixed, since the sources do not name one","needs_analyst":true,"not_affected_if":["no-untrusted-mpeg-input"],"who_is_affected":"Applications that open MPEG files with smpeg through SMPEG_new, SMPEG_new_rwops or SMPEG_new_data, especially with files a user or remote party supplies. The sources say the impact is a crash, not code execution. Applications that never decode untrusted MPEG input can skip it.","user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000649,"input_tokens":3372,"output_tokens":623,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112010':14A,17A '-2026':13A,16A '2.0.0':80C 'allow':92C 'applic':11A,77B,135C 'assert':67B,126C 'attack':93C,104C 'bound':72B,131C 'c':19B 'c-cpp':18B 'contain':81C 'copi':73B,132C 'cpp':20B 'craft':2A,42B,49B,108C 'crash':9A,75B,133C 'cve':12A,15A 'data':62B,121C 'declar':99C 'decod':29B 'file':4A,51B,110C 'header':37B,88C 'integ':33B,83C 'length':44B,103C 'librari':30B 'media':22B 'media-playback':21B 'mpeg':3A,28B,50B,109C 'mpegsystem.cpp':39B,90C 'new':55B,57B,61B,114C,116C,120C 'open':52B,111C 'out-of-bound':69B,128C 'packag':24B 'packet':6A,43B,46B,96C,102C 'playback':23B 'reachabl':66B,125C 'rwop':58B,117C 'size':7A,47B,97C 'smpeg':1A,25B,26B,54B,56B,60B,78C,113C,115C,119C 'stream':36B,87C 'suppli':106C 'trigger':64B,123C 'underflow':5A,34B,84C 'unders':101C 'via':112C 'vulner':85C 'wrap':45B,95C","nicknames":[],"mitigations":[],"who_affected":"Applications that open MPEG files with smpeg through SMPEG_new, SMPEG_new_rwops or SMPEG_new_data, especially with files a user or remote party supplies. The sources say the impact is a crash, not code execution. Applications that never decode untrusted MPEG input can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-18T12:17:13+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112010","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112010","severity":null,"published_at":"2026-10-18T12:17:13+00:00","modified_at":"2026-10-19T21:14:14+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","fetched_at":"2026-10-23T22:28:55+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"}