{"affected":[{"product":"asterisk","source":"CNA: GitHub_M","vendor":"asterisk","versions":[{"status":"affected","version":"< 20.20.1"},{"status":"affected","version":">= 21.0.0-pre1, < 21.12.3"},{"status":"affected","version":">= 22.0.0-pre1, < 22.10.1"},{"status":"affected","version":">= 23.0.0-pre1, < 23.4.1"}]},{"product":"certified-asterisk","source":"CNA: GitHub_M","vendor":"asterisk","versions":[{"status":"affected","version":"< 20.7-cert11"},{"status":"affected","version":">= 22.8-cert1-pre1, < 22.8-cert3"}]}],"cveId":"CVE-2026-57192","cwes":["CWE-125","CWE-131","CWE-787"],"description":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a heap buffer overflow through an out-of-bounds write in the `Codec2` decoder caused by a `floor/ceil sample-count mismatch`. The `codec_codec2` module must be loaded and `Codec2` must be configured on the attacked endpoint. The attacker must pass SIP authentication by username/password or `source IP address matching`, establish a call using `Codec2`, and send carefully crafted `Codec2` audio packets. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.","epss":{"date":"2026-11-02","percentile":0.51162,"score":0.0065},"exploits":[],"kev":null,"metrics":[{"score":6,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}],"modifiedAt":1793708109199,"publishedAt":1793136340363,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-qf8j-jp7h-c5hx"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/02e2d8d51efe1f811f2929224339cb1a35ffc079"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/4f5cad0611c67638a0a61cfedbe645045da8dd56"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/9b085d48fb66e90a0740ea59e26840421fd07acb"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/a0bc717b2261f4df7cdecc22b58a5fffbd1aa398"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/a2f1cc611f7d0f21faa03e8535009df3041c434c"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/aa40bc599a8e628859ef1c4fc944261423ceac0d"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/commit/d4ccfd55ffd7cf6d73a6e5cde347a7464c301006"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}],"remediation":[],"revision":"41a9eba57e3a1c39d219c372af838a4443dbac302f9d4fbcfa9aceace32c01b0","sources":[{"modifiedAt":1793708109199,"name":"CNA: GitHub_M","retrievedAt":1793711387944,"url":"https://www.cve.org/CVERecord?id=CVE-2026-57192"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793711399560,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-57192"}],"ssvc":{"assessedAt":1793708094638,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch","updatedAt":1793711399560}