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Public proof of conceptFix available

CVE-2023-32233

A public proof of concept exists; no exploitation attested.

  • Published2023-05-08
  • Fixed in6.3.2 · 6.2.15 · 6.1.28 · 5.15.111 · 5.10.180 · 5.4.243
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

Timeline

dates in UTC
  1. 2023-05-0820:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.3≥ 6.3, < 6.3.26.3.2
6.2≥ 6.2, < 6.2.156.2.15
6.1≥ 5.16, < 6.1.286.1.28
5.x≥ 5.11, < 5.15.1115.15.111
5.x≥ 5.5, < 5.10.1805.10.180
5.4≥ 4.20, < 5.4.2435.4.243
4.x≥ 4.15, < 4.19.2834.19.283
4.14≥ 3.13, < 4.14.3154.14.315
Netapp hci baseboard management controller
BranchAffectedFixed in
—= h300sno fix published
—= h410cno fix published
—= h410sno fix published
—= h500sno fix published
—= h700sno fix published
Redhat enterprise linux
BranchAffectedFixed in
7.0= 7.0no fix published
8.0= 8.0no fix published
9.0= 9.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bpftoolRed Hat:enterprise_linux:9::baseosall versions · fixed in 0:7.0.0-284.18.1.el9_2and 1 other package
  • bpftoolAlmaLinux:9all versions · fixed in 7.0.0-284.18.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::crball versions · fixed in 0:7.0.0-284.18.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::appstreamall versions · fixed in 0:7.0.0-284.18.1.el9_2
  • dtb-aarch64openSUSE:Leap 15.5all versions · fixed in 5.14.21-150500.55.7.1and 10 other packages
  • dtb-aarch64openSUSE:Leap 15.4all versions · fixed in 5.14.21-150400.24.66.1and 9 other packages
  • dtb-aarch64openSUSE:Leap 15.4all versions · fixed in 5.3.18-150300.59.124.1
  • kernelTuxCare:CentOS:8.5all versions · fixed in 4.18.0-348.7.1.el8_5.tuxcare.els9and 21 other packages

175 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-32233 Red Hat Product Security1,557 products fixed

    kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation

  • ICSA-25-105-08 CISA2 known affected

    ABB M2M Gateway

    ABB M2M Gateway ARM600, firmware versions = 4.1.2 <= 5.0.3 · ABB M2M Gateway SW, software versions = 5.0.1 <= 5.0.3

  • ICSA-24-046-11 CISA11 known affected

    Siemens SCALANCE XCM-/XRM-300

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

  • SSA-806742 Siemens ProductCERT11 known affected

    SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4

    SCALANCE XCH328 (6GK5328-4TS01-2EC2) · SCALANCE XCM324 (6GK5324-8TS01-2AC2) · SCALANCE XCM328 (6GK5328-4TS01-2AC2) · +8 more

  • RHSA-2023:5622 Red Hat Product Security155 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2023:5621 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

25 more advisories

Full record on NVD

Fix

  1. Update Linux linux kernel to 6.3.2 · 6.2.15 · 6.1.28 · 5.15.111 · 5.10.180 · 5.4.243 · 4.19.283 · 4.14.315
  2. Vendor fix CISA ICSA-24-046-11 · 10 productsUpdate to V2.4 or later version
  3. Vendor fix Siemens ProductCERT SSA-806742 · 10 productsUpdate to V2.4 or later version
  4. Vendor fix Red Hat Product Security RHSA-2023:5622 · 155 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  5. Vendor fix Red Hat Product Security RHSA-2023:5574 · 25 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  6. Workaround from the vendor Red Hat Product Security RHSA-2023:5622 · 155 products1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. 2. If the module cannot be disabled, on non-containerized deployments of Red H…
  7. Mitigation from the vendor CISA ICSA-25-105-08 · 2 productsMitigating factors describe conditions and circumstances that make an attack that exploits the vulnerability difficult or less likely to succeed. The following mitigations are recommended. 1. Obtain a cellular private access point (APN). A dedicated private cellular access point and respective SIM…

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-05-08
Last Modified
2026-10-15
NVD status
Modified
GitHub Advisory
GHSA-4qxv-phx5-f6fx

Frequently asked questions

What is CVE-2023-32233?

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

Is CVE-2023-32233 actively exploited?

Active exploitation of CVE-2023-32233 has not been confirmed. Its EPSS score was 13.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-32233?

CVE-2023-32233 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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