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CVE-2026-74715 - bpf: Fix netns reference imbalance in conntrack kfuncs

CVE ID : CVE-2026-74715 Published : Aug. 22, 2026, 4:16 p. m. • 4 hours, 54 minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: bpf: Fix netns reference imbalance in conntrack kfuncs The opts argument of the BPF conntrack kfuncs can point to a shared map value. __bpf_nf_ct_lookup() and __bpf_nf_ct_alloc_entry() read opts-netns_id separately when acquiring and releasing the network namespace reference. The reference imbalance can occur as follows: CPU 0 CPU 1

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