CVE-2026-23392

HIGH EPSS 2.1%

Published Mar 25, 20263mo ago · Modified Jun 17, 20262w ago

7.8 CVSS 3.1

High

Published Mar 25, 2026 3mo ago

Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release flowtable after rcu grace period on error Call synchronize_rcu() after unregistering the hooks from error path, since a hook that already refers to this flowtable can be already registered, exposing this flowtable to packet path and nfnetlink_hook control plane. This error path is rare, it should only happen by reaching the maximum number hooks or by failing to set up to hardware offload, just call synchronize_rcu(). There is a check for already used device hooks by different flowtable that could result in EEXIST at this late stage. The hook parser can be updated to perform this check earlier to this error path really becomes rarely exercised. Uncovered by KASAN reported as use-after-free from nfnetlink_hook path when dumping hooks.

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

2.1% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 13

Vendor	Product	Version	Range
linux	linux_kernel	*	≥4.16.1 – <6.1.167
linux	linux_kernel	*	≥6.2 – <6.6.130
linux	linux_kernel	*	≥6.7 – <6.12.78
linux	linux_kernel	*	≥6.13 – <6.18.20
linux	linux_kernel	*	≥6.19 – <6.19.10
linux	linux_kernel	4.16	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any

References 6

git.kernel.org https://git.kernel.org/stable/c/7e3955b282eae20d61c75e499c75eade51c20060

Patch
git.kernel.org https://git.kernel.org/stable/c/adee3436ccd29f1e514c028899e400cbc6d84065

Patch
git.kernel.org https://git.kernel.org/stable/c/c8092edb9a11f20f95ccceeb9422b7dd0df337bd

Patch
git.kernel.org https://git.kernel.org/stable/c/d2632de96ccb066e0131ad1494241b9c281c60b8

Patch
git.kernel.org https://git.kernel.org/stable/c/d73f4b53aaaea4c95f245e491aa5eeb8a21874ce

Patch
git.kernel.org https://git.kernel.org/stable/c/e78a2dcc7cfb87b64a631441ca7681492b347ef6

Patch

Remediation

git.kernel.org https://git.kernel.org/stable/c/7e3955b282eae20d61c75e499c75eade51c20060

Patch
git.kernel.org https://git.kernel.org/stable/c/adee3436ccd29f1e514c028899e400cbc6d84065

Patch
git.kernel.org https://git.kernel.org/stable/c/c8092edb9a11f20f95ccceeb9422b7dd0df337bd

Patch
git.kernel.org https://git.kernel.org/stable/c/d2632de96ccb066e0131ad1494241b9c281c60b8

Patch
git.kernel.org https://git.kernel.org/stable/c/d73f4b53aaaea4c95f245e491aa5eeb8a21874ce

Patch
git.kernel.org https://git.kernel.org/stable/c/e78a2dcc7cfb87b64a631441ca7681492b347ef6

Patch