Vulnerability details

CVE-2026-57197

asterisk asteriskasterisk certified-asterisk

Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex)

CVSS 4.0

7.7High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.7High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

Affected products

Vendor	Product	Versions	Source
asterisk	asterisk	< 20.20.1	CVEProject cvelistV5 (CNA)
asterisk	asterisk	>= 21.0.0-pre1, < 21.12.3	CVEProject cvelistV5 (CNA)
asterisk	asterisk	>= 22.0.0-pre1, < 22.10.1	CVEProject cvelistV5 (CNA)
asterisk	asterisk	>= 23.0.0-pre1, < 23.4.1	CVEProject cvelistV5 (CNA)
asterisk	certified-asterisk	< 20.7-cert11	CVEProject cvelistV5 (CNA)
asterisk	certified-asterisk	>= 22.8-cert1-pre1, < 22.8-cert3	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/asterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3h x_refsource_CONFIRM
https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1a2 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db x_refsource_MISC
https://github.com/asterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2bbd x_refsource_MISC
https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6 x_refsource_MISC
https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/20.20.1 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/21.12.3 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/22.10.1 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/23.4.1 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 x_refsource_MISC
https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 x_refsource_MISC
https://github.com/asterisk/asterisk/tree/24.0.0-pre1 x_refsource_MISC

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Details

Published: 2026-10-27
Last updated: 2026-11-02
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.53%

Probability of exploitation in 30 days

45.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-122
Heap-based Buffer Overflow
CWE-787
Out-of-bounds Write