CVE-2023-4004

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

State: Published
Severity: 7.8 High
Published: Jul 31, 2023
Updated: Oct 14, 2026
Reserved: Jul 30, 2023

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	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	redhat

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-477.27.1.rt7.290.el8_8 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-477.27.1.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat	0:4.18.0-193.119.1.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRed Hat	0:4.18.0-193.119.1.rt13.170.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRed Hat	0:4.18.0-193.119.1.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRed Hat
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRed Hat	0:4.18.0-193.119.1.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:4.18.0-305.103.1.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRed Hat	0:4.18.0-305.103.1.rt7.178.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRed Hat	0:4.18.0-305.103.1.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRed Hat	0:4.18.0-305.103.1.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRed Hat
Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat
Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat	0:4.18.0-372.75.1.el8_6 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-284.30.1.el9_2 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-284.30.1.rt14.315.el9_2 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-284.30.1.el9_2 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.80.1.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.80.1.rt21.151.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Red Hat	0:4.18.0-372.75.1.el8_6 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 7Red Hat

References

RHSA-2023:4961vendor-advisory
RHSA-2023:4962vendor-advisory
RHSA-2023:4967vendor-advisory
RHSA-2023:5069vendor-advisory
RHSA-2023:5091vendor-advisory
RHSA-2023:5093vendor-advisory
RHSA-2023:5221vendor-advisory
RHSA-2023:5244vendor-advisory
RHSA-2023:5255vendor-advisory
RHSA-2023:5548vendor-advisory
RHSA-2023:5627vendor-advisory
RHSA-2023:7382vendor-advisory
RHSA-2023:7389vendor-advisory
RHSA-2023:7411vendor-advisory
RHSA-2023:7417vendor-advisory
RHSA-2023:7431vendor-advisory
RHSA-2023:7434vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-4004vdb-entry
RHBZ#2225275issue-tracking
https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://security.netapp.com/advisory/ntap-20231027-0001/
https://www.debian.org/security/2023/dsa-5480
https://www.debian.org/security/2023/dsa-5492
https://cert-portal.siemens.com/productcert/html/ssa-831302.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.