AZL-99072
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99072.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-99072
- Upstream
- Published
- 2026-09-03T13:06:12Z
- Modified
- 2026-09-30T05:39:58Z
- Summary
- CVE-2026-80738 affecting package kernel 6.6.157.1-1
- Details
-
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.
- References