Home/CVE/In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused
CVE

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

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.

HIGH · CVSS 7.8 EPSS 0.01004
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

10
linux kernel>= 3.13 and < 4.14.315
linux kernel>= 4.15 and < 4.19.283
linux kernel>= 4.20 and < 5.4.243
linux kernel>= 5.5 and < 5.10.180
linux kernel>= 5.11 and < 5.15.111
linux kernel>= 5.16 and < 6.1.28
linux kernel>= 6.2 and < 6.2.15
linux kernel>= 6.3 and < 6.3.2
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlpacketstormsecurity.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
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 NVD08 May 2023 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
rhsaRHSA-2025:20518Moderate
rhsaRHSA-2025:20095Moderate
rhsaRHSA-2025:6966Low
rhsaRHSA-2023:3349Moderate
rhsaRHSA-2023:3723Moderate
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2023/05/15/5Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2196105Issue TrackingMitigationThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edabMailing ListPatch
https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edabPatch
https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlMailing ListThird Party Advisory
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