Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Frrouting | Frrouting | < 10.5.3 |
Related Weaknesses (CWE)
References
- https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfdPatch
- https://github.com/FRRouting/frr/pull/21002Issue TrackingPatch
- https://github.com/FRRouting/frr/releases/tag/frr-10.5.3Release Notes
- https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parsThird Party Advisory
FAQ
What is CVE-2026-28532?
CVE-2026-28532 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 v...
How severe is CVE-2026-28532?
CVE-2026-28532 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28532?
Check the references section above for vendor advisories and patch information. Affected products include: Frrouting Frrouting.