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FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_pref_pref_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted LSA Update packet.

🗓️ 31 Oct 2025 08:11:07Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 6 Views

FRRouting versions 4.0 to 10.4.1 have a NULL pointer dereference in show_vty_ext_pref_pref_sid causing a denial of service from crafted LSA Update packets.

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18 Feb 2026 10:41Current
7High risk
Vulners AI Score7
CVSS 3.17.5
EPSS0.00582
SSVC
6