CVE-2022-26128

Memory corruption via truncated Babel packet

Published Mar 3, 2022 · Updated Nov 4, 2025

Buffer overflow in FRRouting through 8.1.0 allows attackers to corrupt babeld memory via a truncated Babel packet. In babel_packet_examin in babeld/message.c, the length guard omits the two type-and-length bytes before reading a message body. The public record does not establish whether the resulting out-of-bounds operation causes a crash or code execution; exposure requires babeld to be enabled and Babel routing on an interface.

CVSS severity7.8
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in FRRouting through 8.1.0 allows attackers to corrupt babeld memory via a truncated Babel packet. In babel_packet_examin in babeld/message.c, the length guard omits the two type-and-length bytes before reading a message body. The public record does not establish whether the resulting out-of-bounds operation causes a crash or code execution; exposure requires babeld to be enabled and Babel routing on an interface.

The record

CVE
CVE-2022-26128
Published
Mar 3, 2022
Updated
Nov 4, 2025
Vendor
FRRouting
Product
FRRouting
Classifications
CWE-119, CWE-1284
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=through 8.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FRRouting · FRRoutingversion=through 8.1.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-1284Improper Validation of Specified Quantity in Input

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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