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NVD / CVE Program· CNA redhat

CVE-2022-26127: A buffer overflow vulnerability exists in FRRouting through 8.1.0 due to missing a check on the input packet length in the…

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1% (FIRST EPSS); higher than 63.6% of all records.
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: frr (Alpine:v3.16) 8.2.1-r0; frr (Debian:10) 7.5.1-1.1+deb10u2; frr (Debian:11) 7.5.1-1.1+deb11u3.

Low priority for now. Upgrade to frr (Alpine:v3.16) 8.2.1-r0; frr (Debian:10) 7.5.1-1.1+deb10u2; frr (Debian:11) 7.5.1-1.1+deb11u3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A buffer overflow vulnerability exists in FRRouting through 8.1.0 due to missing a check on the input packet length in the babel_packet_examin function in babeld/message.c.

Published
Mar 3, 2022
Updated
Jun 17, 2026
EPSS
1.0% · 63th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-26127

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
frroutingfrrouting

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a FRRouting

    • through 8.1.0affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • frrouting frroutingup to 8.1 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.16frrbefore 8.2.1-r08.2.1-r0
Debian:10frrbefore 7.5.1-1.1+deb10u27.5.1-1.1+deb10u2
Debian:11frrbefore 7.5.1-1.1+deb11u37.5.1-1.1+deb11u3
Debian:12frrbefore 8.4.1-18.4.1-1
openSUSE:Leap 15.3frrbefore 7.4-150300.4.3.17.4-150300.4.3.1
openSUSE:Tumbleweedfrrbefore 8.1-3.18.1-3.1
SUSE:Linux Enterprise Module for Server Applications 15 SP3frrbefore 7.4-150300.4.3.17.4-150300.4.3.1

Same product

frrouting: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-38406bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
    39Monitor
  • CVE-2023-41361An issue was discovered in FRRouting FRR 9.0.
    39Monitor
  • CVE-2022-37032An out-of-bounds read in the BGP daemon of FRRouting FRR before 8.4 may lead to a segmentation fault and denial of service.
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-26125Mar 3, 2022 · Buffer overflow vulnerabilities exist in FRRouting through 8.1.0 due to wrong checks on the input packet length in isisd/isis_tlvs.c.
    31Monitor
  • ← EarlierCVE-2022-26126Mar 3, 2022 · Buffer overflow vulnerabilities exist in FRRouting through 8.1.0 due to the use of strdup with a non-zero-terminated binary string in…
    31Monitor
  • Later →CVE-2022-26128Mar 3, 2022 · A buffer overflow vulnerability exists in FRRouting through 8.1.0 due to a wrong check on the input packet length in the…
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:frr8.2.1-r0 · Alpine:v3.16Package registry (OSV)
debian:frr8.4.1-1 · Debian:12Package registry (OSV)
opensuse:frr7.4-150300.4.3.1 · openSUSE:Leap 15.3Package registry (OSV)
suse:frr7.4-150300.4.3.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records