7.3

CVE-2026-80738

Medienbericht

bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie

In the Linux kernel, the following vulnerability has been resolved:

bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie

bpf_tcp_gen_syncookie and bpf_tcp_check_syncookie accept a socket pointer
'sk' with argument type ARG_PTR_TO_BTF_ID_SOCK_COMMON. However, they access
sk->sk_protocol without validating whether 'sk' represents a full socket.

Fix this issue by checking sk->sk_state != TCP_LISTEN before inspecting
sk->sk_protocol in both bpf_tcp_gen_syncookie and bpf_tcp_check_syncookie.
Since mini-sockets are never in the TCP_LISTEN state, the condition
short-circuits and prevents dereferencing fullsock-specific fields.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 399040847084a69f345e0a52fd62f04654e0fce3
Version < 23f682083aa3fbc0c49667818efd6979a8bc5ac2
Status affected
Version 399040847084a69f345e0a52fd62f04654e0fce3
Version < 31a420a822ff92e2090bd5d65efe8e34e2d6d9b8
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.2
Status affected
Version 0
Version < 5.2
Status unaffected
Version <= 7.1.*
Version 7.1.9
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.019
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.3 1.8 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Es wurden noch keine Informationen zu CWE veröffentlicht.
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VulnDex Intel
Media Report
08.09.2026 20:38
https://git.kernel.org/stable/c/23f682083aa3fbc0c49667818efd6979a8bc5ac2
https://git.kernel.org/stable/c/31a420a822ff92e2090bd5d65efe8e34e2d6d9b8