CVE-2026-72320
Last modified
CVE-2026-72320 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
Description
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().
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= aaa31047a6d25da0fa101da1ed544e1247949b40, < 0ab8880865f9678eb6174e72c1fc4712e44c745c; >= aaa31047a6d25da0fa101da1ed544e1247949b40, < 238c612357b5a25f03eacf356f95034f8551f218; >= aaa31047a6d25da0fa101da1ed544e1247949b40, < ef0c7d4b04a0e6ad175323c24bc84e11470dd79d; >= aaa31047a6d25da0fa101da1ed544e1247949b40, < e6107a4c74b54cb33e3bce162a63048ae5a6b198 |
| Linux | Linux | 5.13 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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