CVE-2026-57197 Asterisk - Buffer Overflow

Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a heap buffer overflow caused by unbounded memcpy of OGG/Speex packet data in format_ogg_speex, letting attackers crash the system by providing corrupted Speex audio files, exploit requires attacker to create and make the file available with elevated privileges or convince an administrator.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.53% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service
CVSS 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/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
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-122

Vendor fix

Update to versions 20.20.1, 21.12.3, 22.10.1, 23.4.1 or Certified Asterisk 20.7-cert11, 22.8-cert3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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