CVE-2024-55553 Affecting libfrr_pb0 package, versions <8.5.6-150500.4.33.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.37% (59th percentile)

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  • Snyk IDSNYK-SLES156-LIBFRRPB0-13299588
  • published5 Oct 2025
  • disclosed3 Oct 2025

Introduced: 3 Oct 2025

NewCVE-2024-55553  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 libfrr_pb0 to version 8.5.6-150500.4.33.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libfrr_pb0 package and not the libfrr_pb0 package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

In FRRouting (FRR) before 10.3 from 6.0 onward, all routes are re-validated if the total size of an update received via RTR exceeds the internal socket's buffer size, default 4K on most OSes. An attacker can use this to trigger re-parsing of the RIB for FRR routers using RTR by causing more than this number of updates during an update interval (usually 30 minutes). Additionally, this effect regularly occurs organically. Furthermore, an attacker can use this to trigger route validation continuously. Given that routers with large full tables may need more than 30 minutes to fully re-validate the table, continuous issuance/withdrawal of large numbers of ROA may be used to impact the route handling performance of all FRR instances using RPKI globally. Additionally, the re-validation will cause heightened BMP traffic to ingestors. Fixed Versions: 10.0.3, 10.1.2, 10.2.1, >= 10.3.

CVSS Base Scores

version 3.1