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CVE

CWE

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CVE-2026-28532

Published: Apr 30, 2026

Modified: May 25, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

Vendor	Product	Versions
FRRouting	frr	affected `0 - < 10.5.3`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

https://github.com/FRRouting/frr/releases/tag/frr-10.5.3

release-notes

https://github.com/FRRouting/frr/pull/21002

issue-tracking

https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd

patch

https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions

third-party-advisory

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