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Fencer Vulns
high 8.1

CVE-2022-37035 json

An issue was discovered in bgpd in FRRouting (FRR) 8.3.

published 2022-08-02 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-39689

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

An issue was discovered in bgpd in FRRouting (FRR) 8.3. In bgp_notify_send_with_data() and bgp_process_packet() in bgp_packet.c, there is a possible use-after-free due to a race condition. This could lead to Remote Code Execution or Information Disclosure by sending crafted BGP packets. User interaction is not needed for exploitation.

Patch / fix

  • frr Debian 14, Debian 13, Debian 12 8.4.1-1

debian advisories DEBIAN-CVE-2022-37035

  • frr Ubuntu 22.04 LTS 8.1-1ubuntu1.2
  • frr Ubuntu Pro 20.04 LTS 7.2.1-1ubuntu0.2+esm2

ubuntu advisories UBUNTU-CVE-2022-37035

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • frr SLE Module for Server Applications 15 SP4, SLE Module for Server Applications 15 SP3, openSUSE Leap 15.4 +1 more 7.4-150300.4.10.1

suse advisories SUSE-SU-2022:4130-1

  • frr openSUSE Tumbleweed 8.4-1.1

opensuse advisories openSUSE-SU-2024:12516-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-37035 updated cvss 8.1

frr: use-after-free bug due to race conditions in two threads

  • Red Hat Enterprise Linux 8 frr, frr-contrib, frr-selinux Red Hat Enterprise Linux 9 frr, frr-selinux
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.65% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • docs.google.com https://docs.google.com/document/d/1TqYEcZbFeDTMKe2N4XRFwyAjw_mynIHfvzwbx1fmJj8/edit?usp=sharing referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/FRRouting/frr/issues/11698 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.