CVE-2026-90061

CVE CVE-2026-90061EUVD EUVD-2026-81922Published 2026-09-17T16:05:45.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: skip double clone set expressions on element insert Both the dynset and newsetelem path clone the existing set expressions when setting set element expressions if no override expressions are provided. This results in a double clone, once to clone the template set expressions then another clone on the new element. Add a flag to annotate if userspace provides a override expression (ie. expression of the same type of the set but different configuration), otherwise borrow the existing expression from the set. Add conditionals to release expression iif they represent an override. Use this new override_exprs flag to dump the dynset expression override to userspace. This simplifies the existing logic and it also fixes a bug with the connlimit expression which results in a module refcount imbalance WARNING splat when resorting on the default set expressions.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 <43559058d21e0493aa220ac167e0279334dea5f9; patch: 7.2.6; 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 <1e7fb6801d9cc826adcdb7fa0533c397730657f2; 5.7; patch: 7.3-rc1; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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