7.8
High
CVE-2026-23272 In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally bump…
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally bump set->nelems before insertion In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it already. To address this issue, add the element transaction even if set is full, but toggle the set_full flag to report -ENFILE so the abort path safely unwinds the set to its previous state. As for element updates, decrement set->nelems to restore it. A simpler fix is to call synchronize_rcu() in the error path. However, with a large batch adding elements to already maxed-out set, this could cause noticeable slowdown of such batches.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 7.0 | earliest → < 7.0 | 7.0 |
| Linux 6.19 | earliest → < 6.19.7 | 6.19.7 |
| Linux 6.18 | earliest → < 6.18.17 | 6.18.17 |
| Linux 6.12 | earliest → < 6.12.91 | 6.12.91 |
| Linux 6.6 | earliest → < 6.6.141 | 6.6.141 |
| Linux 6.1 | earliest → < 6.1.177 | 6.1.177 |
| Linux 5.15 | earliest → < 5.15.224 | 5.15.224 |
| Linux 5.10 | earliest → < 5.10.273 | 5.10.273 |
| Linux | 4.10 | No fix stated |
Show the other branch Hide the other branch
| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions not published |
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