CVE-2023-4147: Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

Modified

AliasesUBUNTU-CVE-2023-4147DEBIAN-CVE-2023-4147

Published 07-08-2023Last modified 25-02-2026

Vulnerability summary

CVE-2023-4147 is a high (CVSS 7.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 46.2% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (CVE.org)

EPSS score

0.55%

0%100%

Low · -0.01 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

07-08-2023
PublishedVulnerability first disclosed.
25-02-2026
Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

v3.17.8

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 0.56% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu89 products

linux< 5.15.0-82.91
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 5.15.0-1043.48
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1043.48~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2< 6.2.0-1010.10~22.04.1
linux-azureAll versions (No fix recorded) | < 5.15.0-1045.52
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1045.52~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2< 6.2.0-1011.11~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1045.52.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-bluefield< 5.15.0-1022.24
linux-fipsAll versions (No fix recorded)
linux-gcpAll versions (No fix recorded) | < 5.15.0-1040.48
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1040.48~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2< 6.2.0-1012.12~22.04.1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1040.45
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.15.0-1026.31
linux-gkeop-5.15< 5.15.0-1026.31~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-82.91~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2< 6.2.0-31.31~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.15.0-1036.39
linux-ibm-5.15< 5.15.0-1036.39~20.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1037.39
linux-intel-iotg< 5.15.0-1038.43
linux-intel-iotg-5.15< 5.15.0-1038.43~20.04.1
linux-kvm< 5.15.0-1040.45
linux-lowlatency< 5.15.0-82.91
linux-lowlatency-hwe-5.15< 5.15.0-82.91~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2< 6.2.0-1011.11~22.04.1
linux-nvidia< 5.15.0-1031.31
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-tegra< 5.15.0-1017.17
linux-nvidia-tegra-5.15< 5.15.0-1017.17~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1004.4
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1020.20
linux-oracle< 5.15.0-1041.47
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1041.47~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.15.0-1036.39
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1044.49
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1039.43~20.04.2
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-xilinx-zynqmp< 5.15.0-1025.29

Show all 89

Redhat5 products

Debian2 products

linux< 6.1.52-1 | < 6.4.11-1
debian_linuxEOL10.0 | 11.0 | 12.0

Fedoraproject1 product

fedoraEOL38

Linux1 product

linux_kernel≥ 5.9, < 5.10.190 | ≥ 5.11, < 5.15.124 | ≥ 5.16, < 6.1.43 | ≥ 6.2, < 6.4.8 | 6.5:rc1 | 6.5:rc2 | 6.5:rc3

5 vendors · 98 products

References

20 links

access.redhat.com/errata/RHSA-2023:5069Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2023:5091Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2023:5093Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2023:7382Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2023:7389Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2023:7411Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/security/cve/CVE-2023-4147VDB EntryX Refsource REDHATPatchThird Party Advisory
bugzilla.redhat.com/show_bug.cgi?id=2225239Issue TrackingX Refsource REDHATPatchThird Party Advisory
git.kernel.org/pub/…Mailing ListPatch
www.spinics.net/lists/stable/msg671573.htmlMailing ListPatch

Show all 20 references

lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlX Transferred
security.netapp.com/advisory/ntap-20231020-0006/X Transferred
www.debian.org/security/2023/dsa-5480X Transferred
www.debian.org/security/2023/dsa-5492X Transferred
ubuntu.com/security/CVE-2023-4147REPORT
git.kernel.org/linus/0ebc1064e4874d5987722a2ddbc18f94aa53b211REPORT
patchwork.ozlabs.org/project/netfilter-devel/patch/20230723144148.26231-1-pablo@netfilter.org/REPORT
www.cve.org/CVERecord?id=CVE-2023-4147REPORT
security-tracker.debian.org/tracker/CVE-2023-4147Advisory
nvd.nist.gov/vuln/detail/CVE-2023-4147OvalAdvisory