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CVE-2023-4147

Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

HIGH
7.8
CVSS Score
Published: August 7, 2023 at 01:19 PM UTC
Updated: June 17, 2026 at 06:37 AM UTC
8 products affected across 4 vendorsLinux KernelDebian LinuxFedora

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Severity
HIGH7.8
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.012.0
Fedora· Fedora Projectrpm
95%
38
Linux Kernel· Linux
95%
5.11 ≤ v < 5.15.1245.16 ≤ v < 6.1.435.9 ≤ v < 5.10.1906.2 ≤ v < 6.4.86.5 rc16.5 rc26.5 rc3
Affected range stops below 5.10.190, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.124, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.43, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.8, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
9.0
Vendor states this is fixed in 0:5.14.0-284.30.1.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-284.30.1.rt14.315.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.80.1.el9_0 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.80.1.rt21.151.el9_0 (unaffected)
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7 (unaffected)
Vendor states this is fixed in 8 (unaffected)
Vendor states this is fixed in 9 (unaffected)
Enterprise Linux Eus· Red Hatrpm
95%
9.2
Enterprise Linux for Real Time· Red Hat
95%
9.0
Enterprise Linux for Real Time for Nfv· Red Hat
95%
9.0
Enterprise Linux Server Aus· Red Hatrubygems
95%
9.2

References (14)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:5069
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:5091
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:5093
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:7382
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:7389
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:7411
VDB Entryx_refsource_REDHATPatchThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2023-4147
Issue Trackingx_refsource_REDHATPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2225239

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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