CVE-2026-72320

Summary

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

netfilter: nft_lookup: fix catchall element handling with inverted lookups

nft_lookup_eval() decides whether a lookup matched (found) from the direct set lookup and priv->invert before falling back to the catchall element used by interval sets (e.g. nft_set_rbtree) for the open-ended default range. Since found is never recomputed after ext is replaced by the catchall lookup, inverted lookups (NFT_LOOKUP_F_INV, "!= @set") can wrongly match or wrongly skip the catchall element, producing the wrong verdict. Fold the catchall lookup into ext before computing found, matching the order already used by nft_objref_map_eval().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxaaa31047a6d25da0fa101da1ed544e1247949b40 < 0ab8880865f9678eb6174e72c1fc4712e44c745caffected
LinuxLinuxaaa31047a6d25da0fa101da1ed544e1247949b40 < 238c612357b5a25f03eacf356f95034f8551f218affected
LinuxLinuxaaa31047a6d25da0fa101da1ed544e1247949b40 < ef0c7d4b04a0e6ad175323c24bc84e11470dd79daffected
LinuxLinuxaaa31047a6d25da0fa101da1ed544e1247949b40 < e6107a4c74b54cb33e3bce162a63048ae5a6b198affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References