CVE-2026-28532
FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-190 CWE-125 |
| Vendor | frrouting |
| Product | frr |
| Published | Apr 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
FRRouting / frr
0 ≤ 10.5.3
References
github.com: https://github.com/FRRouting/frr/releases/tag/frr-10.5.3 github.com: https://github.com/FRRouting/frr/pull/21002 github.com: https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd vulncheck.com: https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions
Credits
Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck