Home/CVE/A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_
CVE

CVE-2023-4147

A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_

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.

HIGH · CVSS 7.8 EPSS 0.00177
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
▤

Affected Products & Versions

12
linux kernel>= 5.9 and < 5.10.190
linux kernel>= 5.11 and < 5.15.124
linux kernel>= 5.16 and < 6.1.43
linux kernel>= 6.2 and < 6.4.8
linux kernelall versions
fedoraproject fedoraall versions
redhat enterprise linuxall versions
redhat enterprise linux eusall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Aug 2023 · 02:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

30
rhsaRHSA-2023:5069Low
suse-csafSUSE-SU-2023:4301-1
suse-csafSUSE-SU-2023:4308-1
suse-csafSUSE-SU-2023:4322-1
suse-csafSUSE-SU-2023:4325-1
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/errata/RHSA-2023:5091Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5093Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-4147PatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2225239Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ebc1064e4874d5987722a2ddbc18f94aa53b211Mailing ListPatch
https://www.spinics.net/lists/stable/msg671573.htmlMailing ListPatch
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