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CVE-2026-57192

Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch

CVSS score

6.0

EPSS probability

—

Risk score

0.6

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Asterisk Codec Decoder Out-of-Bounds Write Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

An out-of-bounds write vulnerability exists in the Asterisk Codec2 decoder due to a floor and ceil sample-count mismatch. An authenticated attacker can exploit this flaw by sending specially crafted audio packets.

Why does it matter?

This vulnerability can cause a heap buffer overflow, potentially leading to a denial of service and loss of availability on the targeted endpoint.

What should be done?

  • Upgrade to the fixed versions
  • Follow the vendor advisory
  • Disable the codec_codec2 module if unused
Chain of evidence and sources2 verified claims

Kimliği doğrulanmış bir saldırgan, Codec2 kod çözücüsündeki örnek sayısı uyumsuzluğu nedeniyle yığın belleği taşmasına neden olabilir.

S0 · daybreach-canonicalS1 · cvelist

codec_codec2 modülünün yüklenmesi ve Codec2'nin hedeflenen uç noktada yapılandırılmış olması gerekir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

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.

CVSS 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

CWE: CWE-125, CWE-131, CWE-787

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-57192 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1asteriskasterisk View
2asteriskcertified-asterisk View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.0CVSS V40MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/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:XNVD
6.0CVSS V4_0MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-57192 is associated with the following CWEs:

CWE-125: Out-of-bounds ReadCWE-131: Common Weakness Enumeration Entry CWE-131CWE-787: Out-of-bounds Write

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-57192 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://github.com/asterisk/asterisk/security/advisories/GHSA-qf8j-jp7h-c5hxvendor-advisoryhttps://github.com/asterisk/asterisk/commit/02e2d8d51efe1f811f2929224339cb1a35ffc079vendor-advisoryhttps://github.com/asterisk/asterisk/commit/4f5cad0611c67638a0a61cfedbe645045da8dd56vendor-advisoryhttps://github.com/asterisk/asterisk/commit/9b085d48fb66e90a0740ea59e26840421fd07acbvendor-advisoryhttps://github.com/asterisk/asterisk/commit/a0bc717b2261f4df7cdecc22b58a5fffbd1aa398vendor-advisoryhttps://github.com/asterisk/asterisk/commit/a2f1cc611f7d0f21faa03e8535009df3041c434cvendor-advisoryhttps://github.com/asterisk/asterisk/commit/aa40bc599a8e628859ef1c4fc944261423ceac0dvendor-advisoryhttps://github.com/asterisk/asterisk/commit/d4ccfd55ffd7cf6d73a6e5cde347a7464c301006vendor-advisoryhttps://github.com/asterisk/asterisk/releases/tag/20.20.1vendor-advisoryhttps://github.com/asterisk/asterisk/releases/tag/21.12.3vendor-advisory

CVSS Vector Radar Chart

6.0 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

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
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-125 CWE-131 CWE-787

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CVE-2026-57192 · Asterisk: Out-of-Bounds Write in Codec2…