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CVE-2026-28532

Disclosed 2026-04-30

Description

FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator variable truncates uint32_t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer advancement continues unchecked. Attackers with an established OSPF adjacency can send a crafted LS Update packet with a malicious Type 10 or Type 11 Opaque LSA to trigger out-of-bounds memory reads and crash all affected routers in the OSPF area or autonomous system.

Severity & CVSS Score

6.5 MEDIUM CVSS 3.1
Attack Vector Adjacent network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

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

Weakness Enumeration

CWE-IDName
CWE-190 Integer Overflow or Wraparound
CWE-125 Out-of-bounds Read

Affected FRR Versions

  • < 10.5.3

Versions prior to 10.0 are end-of-life and no longer receive security updates.

References

URLSource
https://github.com/FRRouting/frr/releases/tag/frr-10.5.3 GitHub
https://github.com/FRRouting/frr/pull/21002 GitHub
https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd GitHub
https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions vulncheck.com

Git Fixes

Raw Data