CVE-2026-23272

HIGH EPSS 2.4%
Published Mar 20, 20263mo ago · Modified May 23, 20261mo ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 20, 2026 3mo ago
Last Modified May 23, 2026 1mo ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.9.33  –  <4.10
linuxlinux_kernel*≥4.10.1  –  <6.18.17
linuxlinux_kernel*≥6.19  –  <6.19.7
linuxlinux_kernel4.10any
linuxlinux_kernel4.10any
linuxlinux_kernel4.10any
linuxlinux_kernel4.10any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/6826131c7674329335ca25df2550163eb8a1fd0c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/86bc4b1a0f672d47ac19f9022432cb6a2e01cb33
  • git.kernel.org https://git.kernel.org/stable/c/ccb8c8f3c1127cf34d18c737309897c68046bf21
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/def602e498a4f951da95c95b1b8ce8ae68aa733a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e3ccb11fc8249759d23326038c8db987ddaabc77

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6826131c7674329335ca25df2550163eb8a1fd0c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ccb8c8f3c1127cf34d18c737309897c68046bf21
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/def602e498a4f951da95c95b1b8ce8ae68aa733a
    Patch