cbcvebase.
CVE-2026-23392
published 2026-03-25

CVE-2026-23392: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release flowtable after rcu grace period on error Call…

PriorityP336high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.12%
2.1th percentile
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.

Affected

75 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.19.10-1 (forky)linux 6.19.10-1 (forky)
linuxlinux
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < d2632de96ccb066e0131ad1494241b9c281c60b8d2632de96ccb066e0131ad1494241b9c281c60b8
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < adee3436ccd29f1e514c028899e400cbc6d84065adee3436ccd29f1e514c028899e400cbc6d84065
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < 7e3955b282eae20d61c75e499c75eade51c200607e3955b282eae20d61c75e499c75eade51c20060
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < c8092edb9a11f20f95ccceeb9422b7dd0df337bdc8092edb9a11f20f95ccceeb9422b7dd0df337bd
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < e78a2dcc7cfb87b64a631441ca7681492b347ef6e78a2dcc7cfb87b64a631441ca7681492b347ef6
linuxlinux>= 3b49e2e94e6ebb8b23d0955d9e898254455734f8 < d73f4b53aaaea4c95f245e491aa5eeb8a21874ced73f4b53aaaea4c95f245e491aa5eeb8a21874ce
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.19.10-16.19.10-1
linuxlinux_kernel>= 4.16.0 < 6.1.1676.1.167
linuxlinux_kernel>= 4.16.1 < 6.1.1676.1.167
linuxlinux_kernel>= 6.13 < 6.18.206.18.20
linuxlinux_kernel>= 6.13.0 < 6.18.206.18.20
linuxlinux_kernel>= 6.19 < 6.19.106.19.10
linuxlinux_kernel>= 6.19.0 < 6.19.106.19.10
linuxlinux_kernel>= 6.2 < 6.6.1306.6.130
linuxlinux_kernel>= 6.2.0 < 6.6.1306.6.130

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_msrc7.1HIGH
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