CVE-2022-40302

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-03 · updated 2026-06-17
Weakness: CWE-125

Description

An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case.

Affected products

Debian Linux: 10.0, 11.0, 12.0
FRRouting: through 8.4

References

https://github.com/FRRouting/frr/releases
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html
https://www.debian.org/security/2023/dsa-5495
https://github.com/FRRouting/frr/releases
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html
https://www.debian.org/security/2023/dsa-5495

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