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No exploitation reportedFix available

CVE-2022-36440

No exploitation reported by the sources we read.

  • Published2023-04-03
  • WeaknessCWE-617

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.

Timeline

dates in UTC
  1. 2023-04-0316:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
12.0= 12.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
36.x= 36no fix published
37.x= 37no fix published
38.x= 38no fix published
Frrouting
BranchAffectedFixed in
8.3= 8.3no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • frrTuxCare:AlmaLinux:9.2all versions · fixed in 8.3.1-5.el9.2.alma.tuxcare.els2and 1 other package
  • frrRed Hat:enterprise_linux:9::appstreamall versions · fixed in 0:8.3.1-11.el9_3and 3 other packages
  • frrDebian:14all versions · fixed in 8.4.1-1
  • frrDebian:13all versions · fixed in 8.4.1-1
  • frrDebian:12all versions · fixed in 8.4.1-1
  • frrDebian:10all versions · fixed in 7.5.1-1.1+deb10u1
  • frrAlmaLinux:9all versions · fixed in 8.3.1-11.el9_3.alma.1and 1 other package

Vendor advisories

  • CVE-2022-36440 Red Hat Product Security14 products fixed

    frr: Reachable assertion in peek_for_as4_capability function

  • RHSA-2023:6434 Red Hat Product Security14 products fixed

    Red Hat Security Advisory: frr security and bug fix update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2023:6434 · 14 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2023-04-03
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cpmq-crvm-2w5p

Frequently asked questions

What is CVE-2022-36440?

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.

Is CVE-2022-36440 actively exploited?

Active exploitation of CVE-2022-36440 has not been confirmed. Its EPSS score was 1.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-36440?

CVE-2022-36440 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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