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.
https://github.com/asterisk/asterisk/tree/24.0.0-pre1
https://github.com/asterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3h
https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
https://github.com/asterisk/asterisk/releases/tag/23.4.1
https://github.com/asterisk/asterisk/releases/tag/22.10.1
https://github.com/asterisk/asterisk/releases/tag/21.12.3
https://github.com/asterisk/asterisk/releases/tag/20.20.1
https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809
https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6
https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3
https://github.com/asterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2bbd
https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db
https://github.com/asterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1a2
https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8
Published: 2026-10-27
Updated: 2026-10-28
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 8.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Severity: High
Base Score: 7.7
Vector: 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
Severity: High
EPSS: 0.00531