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CVE-2026-43114 is a flaw in the Linux kernel Netfilter nftables pipapo set AVX2 matching implementation. While processing a multi-field key, the AVX2 match functions can return early before consuming the complete input and clearing stale bits in the match map. If lookup skips an expired or generation-invalid entry, incorrect masking in the subsequent skip step can identify an entry using only the first key field and return it despite a differing final field. This can cause a non-matching entry to be treated as a match, including during pipapo set reload operations after a set flush.
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A Linux kernel netfilter nft_set_pipapo_avx2 flaw involving return of a non-matching entry during expiry handling.
A vulnerability referenced in a Red Hat Enterprise Linux 9.6 kernel-package security update; the content provides no technical flaw description.
A Linux kernel Netfilter nft_set_pipapo_avx2 flaw involving the return of a non-matching entry after expiry.
A Linux kernel Netfilter nft_set_pipapo_avx2 flaw in which an expired entry can cause a non-matching entry to be returned. The affected RHEL 9 kpatch live-patch packages are addressed by RHSA-2026:62638.
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Cross-references every affected SKU, including bundled OEM variants.
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