CVE-2026-57192 (GCVE-0-2026-57192)
Vulnerability from cvelistv5
Published
2026-10-27 21:25
Modified
2026-10-27 21:25
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
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.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| asterisk | asterisk |
Version: < 20.20.1 Version: >= 21.0.0-pre1, < 21.12.3 Version: >= 22.0.0-pre1, < 22.10.1 Version: >= 23.0.0-pre1, < 23.4.1 |
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{
"containers": {
"cna": {
"affected": [
{
"product": "asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 20.20.1"
},
{
"status": "affected",
"version": "\u003e= 21.0.0-pre1, \u003c 21.12.3"
},
{
"status": "affected",
"version": "\u003e= 22.0.0-pre1, \u003c 22.10.1"
},
{
"status": "affected",
"version": "\u003e= 23.0.0-pre1, \u003c 23.4.1"
}
]
},
{
"product": "certified-asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 20.7-cert11"
},
{
"status": "affected",
"version": "\u003e= 22.8-cert1-pre1, \u003c 22.8-cert3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "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",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-131",
"description": "CWE-131: Incorrect Calculation of Buffer Size",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-27T21:25:40.363Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-qf8j-jp7h-c5hx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-qf8j-jp7h-c5hx"
},
{
"name": "https://github.com/asterisk/asterisk/commit/02e2d8d51efe1f811f2929224339cb1a35ffc079",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/02e2d8d51efe1f811f2929224339cb1a35ffc079"
},
{
"name": "https://github.com/asterisk/asterisk/commit/4f5cad0611c67638a0a61cfedbe645045da8dd56",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/4f5cad0611c67638a0a61cfedbe645045da8dd56"
},
{
"name": "https://github.com/asterisk/asterisk/commit/9b085d48fb66e90a0740ea59e26840421fd07acb",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/9b085d48fb66e90a0740ea59e26840421fd07acb"
},
{
"name": "https://github.com/asterisk/asterisk/commit/a0bc717b2261f4df7cdecc22b58a5fffbd1aa398",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/a0bc717b2261f4df7cdecc22b58a5fffbd1aa398"
},
{
"name": "https://github.com/asterisk/asterisk/commit/a2f1cc611f7d0f21faa03e8535009df3041c434c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/a2f1cc611f7d0f21faa03e8535009df3041c434c"
},
{
"name": "https://github.com/asterisk/asterisk/commit/aa40bc599a8e628859ef1c4fc944261423ceac0d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/aa40bc599a8e628859ef1c4fc944261423ceac0d"
},
{
"name": "https://github.com/asterisk/asterisk/commit/d4ccfd55ffd7cf6d73a6e5cde347a7464c301006",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/commit/d4ccfd55ffd7cf6d73a6e5cde347a7464c301006"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/20.20.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/21.12.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/22.10.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/23.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"
},
{
"name": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"
},
{
"name": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
}
],
"source": {
"advisory": "GHSA-qf8j-jp7h-c5hx",
"discovery": "UNKNOWN"
},
"title": "Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-57192",
"datePublished": "2026-10-27T21:25:40.363Z",
"dateReserved": "2026-06-24T02:00:46.800Z",
"dateUpdated": "2026-10-27T21:25:40.363Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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