HighCVE-2026-57197

    Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex) (CVE-2026-57197)

    Published Last modified Sources: BSI, CVE.org

    What is affected, what to do

    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 unbounded `memcpy` of `OGG/Speex` packet data in `format_ogg_speex` can cause a heap buffer overflow and crash Asterisk when reading a file containing corrupted Speex audio.

    Update Asterisk to version 20.20.1, Asterisk Certified-asterisk to version 20.7-cert11.

    Affected
    • Asterisk gte 21.0.0-pre1, < 21.12.3..*
    • Asterisk lt *..20.20.1
    • Asterisk Certified-asterisk gte 22.8-cert1-pre1, < 22.8-cert3..*
    • Asterisk Certified-asterisk lt *..20.7-cert11
    Fixed in
    • Asterisk 20.20.1
    • Asterisk Certified-asterisk 20.7-cert11

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    7.7

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v4

    7.7

    CVSS v4

    Severity High on the scale from 0 to 10.

    Source: BSI, CVE.org

    —

    EPSS score

    No value is available for this vulnerability.

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    68.50 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    7.7 Methodology
    CVSS v4

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    7.7
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-122, CWE-787

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    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 unbounded `memcpy` of `OGG/Speex` packet data in `format_ogg_speex` can cause a heap buffer overflow and crash Asterisk when reading a file containing corrupted Speex audio. The attacker must create the file and make it available to Asterisk either through sufficiently elevated privileges or by convincing an Asterisk administrator to make it available. Asterisk must also be configured to play that file. 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.

    Source: BSI WID Portal, BSI CSAF, cvelistv5, NVD (NIST), CVE.org (MITRE)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    asteriskasterisk
    • ≥ 21.0.0-pre1, < 21.12.3
    • < 20.20.1
    • —
    • 20.20.1
    asteriskcertified-asterisk
    • < 20.7-cert11
    • ≥ 22.8-cert1-pre1, < 22.8-cert3
    • 20.7-cert11
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-122Heap-based Buffer Overflow

      Variant

      A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

      Entry at MITRE CWE-122

    • CWE-787Out-of-bounds Write

      Base

      The product writes data past the end, or before the beginning, of the intended buffer.

      Entry at MITRE CWE-787

    References & sources

    • github.comasterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3hx_refsource_CONFIRM
    • github.comasterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990d…x_refsource_MISC
    • github.comasterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1…x_refsource_MISC
    • github.comasterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1…x_refsource_MISC
    • github.comasterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2b…x_refsource_MISC
    • github.comasterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2…x_refsource_MISC
    • github.comasterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633…x_refsource_MISC
    • github.comasterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b08…x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/20.20.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/21.12.3x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/22.10.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/23.4.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/certified-20.7-cert11x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/certified-22.8-cert3x_refsource_MISC
    • github.comasterisk/asterisk/tree/24.0.0-pre1x_refsource_MISC

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. ReceivedGitHub

      CVSS V4.0: AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

      Weakness type: CWE-787, CWE-122

      Description added or changed

      Show 20 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      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 unbounded `memcpy` of `OGG/Speex` packet data in `format_ogg_speex` can cause a heap buffer overflow and crash Asterisk when reading a file containing corrupted Speex audio. The attacker must create the file and make it available to Asterisk either through sufficiently elevated privileges or by convincing an Asterisk administrator to make it available. Asterisk must also be configured to play that file. 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.
      CVSSadded
      —
      AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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
      Weakness type (CWE)added
      —
      CWE-787
      Weakness type (CWE)added
      —
      CWE-122
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57197.json">CVE-2026-57197</a>
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1a2
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2bbd
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/20.20.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/21.12.3
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/22.10.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/23.4.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
      Referenceadded
      —
      https://github.com/asterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3h
      Referenceadded
      —
      https://github.com/asterisk/asterisk/tree/24.0.0-pre1

      Source identifier: security-advisories@github.com

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