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.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
FRRouting frr affected
Version Status Constraints
0 affected ≤ 10.5.3

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd cve-icon cve-icon
https://github.com/FRRouting/frr/pull/21002 cve-icon cve-icon
https://github.com/FRRouting/frr/releases/tag/frr-10.5.3 cve-icon cve-icon
https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions cve-icon cve-icon
History

Thu, 30 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
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.
Title FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions
Weaknesses CWE-125
CWE-190
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-30T20:17:51.060Z

Reserved: 2026-02-27T21:07:55.469Z

Link: CVE-2026-28532

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-30T21:16:31.250

Modified: 2026-04-30T21:16:31.250

Link: CVE-2026-28532

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses