CVE-2024-31948Network attack vector

bgpd crash via malformed Prefix SID parsing

Published Apr 7, 2024 · Updated Nov 4, 2025

Denial of service in FRRouting 8.4.0 through 10.0.0 allows remote authenticated users to crash bgpd via a malformed BGP UPDATE. The Prefix SID parser sets the attribute-present flag before validating transitive flags or TLVs, so malformed input reaches inconsistent error handling instead of being discarded. An established BGP peer must send the crafted UPDATE; the resulting bgpd process crash interrupts route processing without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in FRRouting 8.4.0 through 10.0.0 allows remote authenticated users to crash bgpd via a malformed BGP UPDATE. The Prefix SID parser sets the attribute-present flag before validating transitive flags or TLVs, so malformed input reaches inconsistent error handling instead of being discarded. An established BGP peer must send the crafted UPDATE; the resulting bgpd process crash interrupts route processing without reported data disclosure or modification.

The record

CVE
CVE-2024-31948
Published
Apr 7, 2024
Updated
Nov 4, 2025
Vendor
FRRouting
Product
FRRouting
Classifications
CWE-1287, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2024CVE 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=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FRRouting · FRRoutingversion=*

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1287Improper Validation of Specified Type of Input
T1499.004Application or System Exploitation

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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