CVE-2026-28532
FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions
- State
- Published
- Severity
- 6.0 Medium
- Published
- Apr 30, 2026
- Updated
- Oct 1, 2026
- Reserved
- Feb 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
frrFRRouting |
|
References
- https://github.com/FRRouting/frr/releases/tag/frr-10.5.3release-notes
- https://github.com/FRRouting/frr/pull/21002issue-tracking
- https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfdpatch
- https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functionsthird-party-advisory
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