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CVE-2023-4004

24
FAUCET Score

CVE-2023-4004 is a high-severity use-after-free vulnerability in the Linux kernel's netfilter component, specifically affecting Debian, Fedora, Linux, NetApp, and Red Hat products. This flaw allows a local attacker to crash the system or potentially escalate privileges by triggering the nft_pipapo_remove function without a necessary element. While the CVSS score is 7.8 (HIGH), indicating significant impact, there is currently no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.6, < 5.10.188CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.15.123CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.42CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.4.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
57.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 91st percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.126.1-1 on CBL Mariner 2.0Fixed in: 5.15.126.1-1
microsoftpatch availablevia msrc
Product: 17832-16823Fixed in: 5.15.126.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.126.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.126.1-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: kernel-rt-0:4.18.0-193.119.1.rt13.170.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: kernel-0:4.18.0-193.119.1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: kernel-0:4.18.0-193.119.1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: kernel-0:4.18.0-305.103.1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: kernel-0:4.18.0-305.103.1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: kernel-0:4.18.0-305.103.1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-477.27.1.rt7.290.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kernel-0:4.18.0-372.75.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-284.30.1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kernel-0:5.14.0-70.80.1.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-372.75.1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kpatch-patch
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-477.27.1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: kernel-0:4.18.0-193.119.1.el8_2
View patch

Vendor Advisories (3)

microsoft2023-Aug/CVE-2023-4004

CVE-2023-4004

Aug 8, 2023
redhatCVE-2023-4004Important

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

Jul 19, 2023
microsoft2023-Jul/CVE-2023-4004Important

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

Jul 11, 2023

References

packetstormsecurity.com / files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
packetstormsecurity.com / files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
lists.debian.org / debian-lts-announce/2023/10/msg00027.html
security.netapp.com / advisory/ntap-20231027-0001
debian.org / security/2023/dsa-5480
debian.org / security/2023/dsa-5492
access.redhat.com / errata/RHSA-2023:4961
Third Party Advisory
access.redhat.com / errata/RHSA-2023:4962
Third Party Advisory
access.redhat.com / errata/RHSA-2023:4967
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5069
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5091
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5093
Broken LinkThird Party Advisory
access.redhat.com / errata/RHSA-2023:5221
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5244
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5255
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5548
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5627
Third Party Advisory
access.redhat.com / errata/RHSA-2023:7382
Third Party Advisory
access.redhat.com / errata/RHSA-2023:7389
Third Party Advisory
access.redhat.com / errata/RHSA-2023:7411
Third Party AdvisoryVDB Entry
access.redhat.com / errata/RHSA-2023:7417
Third Party AdvisoryVDB Entry
access.redhat.com / errata/RHSA-2023:7431
Third Party AdvisoryVDB Entry
access.redhat.com / errata/RHSA-2023:7434
Third Party AdvisoryVDB Entry
access.redhat.com / security/cve/CVE-2023-4004
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
patchwork.ozlabs.org / project/netfilter-devel/patch/[email protected]
Mailing ListPatchThird Party Advisory