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Review reviewHigh

CVE-2023-54200

Linux

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always release netdev hooks from notifier This reverts "netfilter: nf_tables: skip netdev events generated on netns removal". The problem is that when a veth device is released, the veth release callback will also queue the peer netns device for removal. Its possible that the peer netns is also slated for removal. In this case, the device memory is already released before the pre_exit hook of the peer netns runs: BUG: KASAN: slab-use-after-free in nf_hook_entry_head+0x1b8/0x1d0 Read of size 8 at addr f...

CVSS
7.8
EPSS
0.13%
3.01% percentile
CISA KEV
Not listed
Published
2025.12.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always release netdev hooks from notifier This reverts "netfilter: nf_tables: skip netdev events generated on netns removal". The problem is that when a veth device is released, the veth release callback will also queue the peer netns device for removal. Its possible that the peer netns is also slated for removal. In this case, the device memory is already released before the pre_exit hook of the peer netns runs: BUG: KASAN: slab-use-after-free in nf_hook_entry_head+0x1b8/0x1d0 Read of size 8 at addr f...

Affected product and versions

Product
Linux
Affected versions
>= 68a3765c659f809dcaac20030853a054646eb739 < 8d56f00c61f67b450fbbdcb874855e60ad92c560, >= 68a3765c659f809dcaac20030853a054646eb739 < 30e4b13b1bfbdf3bf3b27036d8209ea1b9f0d880, >= 68a3765c659f809dcaac20030853a054646eb739 < 94032527efbac13be702c76afb9d872c0cca7a43, >= 68a3765c659f809dcaac20030853a054646eb739 < dc1c9fd4a8bbe1e06add9053010b652449bfe411, >= 90c7c58aa2bd02c65a4c63b7dfe0b16eab12cf9f, >= 5.14.15 < 5.15, >= 5.15
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available