CVE-2026-57187

high

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 authenticated attacker may cause a heap-use-after-free in `PJSIP TCP/SDP` handling by sending a `SIP INVITE` over a connection-oriented transport and disconnecting before Asterisk responds with the `200 OK`. So far, the crash has only been reproduced when Asterisk is built with `Address Sanitizer`, which detects the issue. `Address Sanitizer` is a development tool with significant performance overhead and, according to the maintainer, is not used in production systems. 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

https://github.com/asterisk/asterisk/tree/24.0.0-pre1

https://github.com/asterisk/asterisk/security/advisories/GHSA-g8q2-p36q-94f6

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/f1e47621472bb3d8ad71f32823f5ca986e008437

https://github.com/asterisk/asterisk/commit/d4e30005940f86942745bcc64f34748d69870247

https://github.com/asterisk/asterisk/commit/b7ba85458796ef54b471017287c7806095dbda76

https://github.com/asterisk/asterisk/commit/9e0386c6d259f0c7499d52499d9891bee8a494fa

https://github.com/asterisk/asterisk/commit/6e1f4df744369d66ea6f412e355d819b2a7bf26c

https://github.com/asterisk/asterisk/commit/27b9544b32f059a4f614169243eaa7559f622aa0

https://github.com/asterisk/asterisk/commit/0f076168e0be31ebee37762192d0ee049e9c0d42

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-110076

Details

Source: Mitre, NVD

Published: 2026-10-26

Updated: 2026-10-27

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00481