NetDEF FRRouting up to 10.5.1 bgpd bgpd/bgp_packet.c bgp_notify_decapsulate_hard_reset out-of-bounds

Summaryinfo

A vulnerability classified as critical was found in NetDEF FRRouting up to 10.5.1. This issue affects the function bgp_notify_decapsulate_hard_reset of the file bgpd/bgp_packet.c of the component bgpd. Such manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2026-129217. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in NetDEF FRRouting up to 10.5.1. Affected by this issue is the function bgp_notify_decapsulate_hard_reset of the file bgpd/bgp_packet.c of the component bgpd. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In FRRouting (FRR) 8.3 through 10.5.1, bgp_notify_decapsulate_hard_reset() in bgpd/bgp_packet.c does not validate the length of the data field of a received BGP NOTIFICATION Cease/Hard Reset message (RFC 8538). When the data field is exactly one byte long, the function reads one byte past the end of a heap buffer and the 16-bit length of the encapsulated data underflows to 65535, causing a 65535-byte out-of-bounds heap read followed by an assertion failure. A remote BGP peer that has established a session and negotiated the Graceful Restart capability with the Notification (N) bit can send such a message to crash the bgpd daemon, terminating all BGP sessions (denial of service). This is fixed in 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 and 10.6.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-129217 since 11/13/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 10.0.5, 10.1.5, 10.2.6, 10.3.4, 10.4.3, 10.5.2 or 10.6.0 eliminates this vulnerability.

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Productinfo

Vendor

• NetDEF

Name

• FRRouting

Version

• 10.5.0
• 10.5.1

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CPE 2.2info

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