CVE catalog

CVE-2022-42917

In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for

[CVE catalog]

Severity: High · CVSS 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Jan 1, 2022, 12:00:00 AM UTC
Updated: Sep 14, 2026, 12:16:55 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.12% · Oct 25, 2026

In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	frr	sid	`10.7.1-6`	fixed
Debian	frr	forky	`10.7.1-6`	fixed
Debian	frr	trixie	`10.3-3+deb13u1`	fixed
Debian	frr	trixie-security	`10.3-3+deb13u1`	fixed
Debian	frr	bookworm	`8.4.4-1.1~deb12u2`	fixed
Debian	frr	bookworm-security	`8.4.4-1.1~deb12u2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	frr	source	sid	`8.4.1-1`	not yet assigned	Not reported	Not reported
Debian	frr	source	forky	`8.4.1-1`	not yet assigned	Not reported	Not reported
Debian	frr	source	trixie	`8.4.1-1`	not yet assigned	Not reported	Not reported
Debian	frr	source	bookworm	`8.4.1-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[frr]Unknown
Details (4)
- 8.4.4-1.1~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
[frr-doc]Unknown
Source package: [frr]
Details (4)
- 8.4.4-1.1~deb12u2 · all · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
[frr-pythontools]Unknown
Source package: [frr]
Details (4)
- 8.4.4-1.1~deb12u2 · all · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · all · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
[frr-rpki-rtrlib]Unknown
Source package: [frr]
Details (4)
- 8.4.4-1.1~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
[frr-snmp]Unknown
Source package: [frr]
Details (4)
- 8.4.4-1.1~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm
- 8.4.4-1.1~deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 8.4.1-1
  nvd · frr · debian · bookworm

Observed: Oct 23, 2026, 6:30:15 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]