CVE-2026-28532: CWE-190: Integer Overflow or Wraparound in FRRouting frr
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.
AI Analysis
Technical Summary
CVE-2026-28532 describes an integer overflow vulnerability in FRRouting (frr) before version 10.5.3. The issue occurs in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator truncates uint32_t values returned by the TLV_SIZE() macro. This truncation causes the loop termination condition to fail while pointer advancement continues unchecked, resulting in out-of-bounds memory reads. Exploitation requires an attacker to have an established OSPF adjacency and involves sending a crafted LS Update packet with malicious Type 10 or Type 11 Opaque LSA. The impact includes potential router crashes affecting the OSPF area or autonomous system. The CVSS 4.0 vector indicates attack complexity is low, no privileges are required, and the vulnerability can be exploited remotely within the network. No patch or official remediation is currently documented.
Potential Impact
Successful exploitation can cause out-of-bounds memory reads leading to denial of service by crashing all affected routers within the OSPF area or autonomous system. This disrupts routing availability and network stability. There is no indication of data confidentiality or integrity impact beyond service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, network administrators should consider restricting OSPF adjacency formation to trusted devices and monitor for anomalous LS Update packets with Type 10 or Type 11 Opaque LSAs. No official remediation or temporary fix has been published at this time.
CVE-2026-28532: CWE-190: Integer Overflow or Wraparound in FRRouting frr
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 v4.0
Score 6.0medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-28532 describes an integer overflow vulnerability in FRRouting (frr) before version 10.5.3. The issue occurs in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator truncates uint32_t values returned by the TLV_SIZE() macro. This truncation causes the loop termination condition to fail while pointer advancement continues unchecked, resulting in out-of-bounds memory reads. Exploitation requires an attacker to have an established OSPF adjacency and involves sending a crafted LS Update packet with malicious Type 10 or Type 11 Opaque LSA. The impact includes potential router crashes affecting the OSPF area or autonomous system. The CVSS 4.0 vector indicates attack complexity is low, no privileges are required, and the vulnerability can be exploited remotely within the network. No patch or official remediation is currently documented.
Potential Impact
Successful exploitation can cause out-of-bounds memory reads leading to denial of service by crashing all affected routers within the OSPF area or autonomous system. This disrupts routing availability and network stability. There is no indication of data confidentiality or integrity impact beyond service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, network administrators should consider restricting OSPF adjacency formation to trusted devices and monitor for anomalous LS Update packets with Type 10 or Type 11 Opaque LSAs. No official remediation or temporary fix has been published at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-02-27T21:07:55.469Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f3b9c5cbff5d8610805806
Added to database: 4/30/2026, 8:21:25 PM
Last enriched: 5/26/2026, 7:43:43 AM
Last updated: 6/15/2026, 10:25:42 AM
Views: 61
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