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CVE-2026-28532— FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions

Quick assessment

Affected
FRRouting frr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FRRouting是FRRouting开源的一种在类 Unix 平台上运行的网络路由软件套件。 FRRouting 10.5.3之前版本存在缓冲区错误漏洞，该漏洞源于七个OSPF流量工程和段路由TLV解析器函数中存在整数溢出，uint16_t累加器变量截断TLV_SIZE()宏返回的uint32_t值，导致循环终止条件失败而指针推进未检查，攻击者可以通过建立的OSPF邻接关系发送特制的LS更新数据包触发越界内存读取并崩溃OSPF区域或自治系统中的所有受影响路由器。

CVSS 6.5 · Medium EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
FRRouting frr < 10.5.3 affected
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I. Basic Information for CVE-2026-28532

Vulnerability Information
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Vulnerability Title
FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
FRRouting 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FRRouting是FRRouting开源的一种在类 Unix 平台上运行的网络路由软件套件。 FRRouting 10.5.3之前版本存在缓冲区错误漏洞，该漏洞源于七个OSPF流量工程和段路由TLV解析器函数中存在整数溢出，uint16_t累加器变量截断TLV_SIZE()宏返回的uint32_t值，导致循环终止条件失败而指针推进未检查，攻击者可以通过建立的OSPF邻接关系发送特制的LS更新数据包触发越界内存读取并崩溃OSPF区域或自治系统中的所有受影响路由器。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FRRouting frr 0 ~ 10.5.3 -

II. Public POCs for CVE-2026-28532

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III. Intelligence Information for CVE-2026-28532

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Patches & Fixes for CVE-2026-28532 (2)

Vendor Advisories for CVE-2026-28532 (1)

Vendor Pages for CVE-2026-28532 (1)

IV. Related Vulnerabilities

Same product: frr
Same vendor: FRRouting
Same weakness: CWE-190

V. Comments for CVE-2026-28532

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