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CVE-2023-4004

Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

High7.8EPSS 0.92%
Published
Updated
Reserved
Assigned by
redhat

Description

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.

Scores

CVSS scores of CVE-2023-4004, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.92% · top 40% of all CVEs (7 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

Affected products

What to do

Workaround: This flaw can be mitigated by preventing the affected netfilter kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

References (28)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .