CVE-2026-28532
MEDIUM EPSS 13.1%
Published Apr 30, 20262mo ago · Modified Jun 17, 20261w ago
6.0 CVSS 4.0
Published Apr 30, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
13.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 2
CWE-125 Out-of-bounds Read Memory Safety
CWE-190 Integer Overflow or Wraparound Numeric Error
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| frrouting | frrouting | * | <10.5.3 |
References 4
- github.com https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd
- github.com https://github.com/FRRouting/frr/pull/21002
- github.com https://github.com/FRRouting/frr/releases/tag/frr-10.5.3
- vulncheck.com https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions
Remediation
- github.com https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd
- github.com https://github.com/FRRouting/frr/pull/21002