Use After Free in Linux Kernel
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.134 (96.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.130 · newest: 0.134 · change: +0.005
Affected products
- Linux Kernel
- NetApp Hci Baseboard Management Controller — versions h300s, h410c, h410s
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
- Liuk3r/CVE-2023-32233
- oferchen/POC-CVE-2023-32233
- PIDAN-HEIDASHUAI/CVE-2023-32233
- Destawell/gemini-2.5-pro-nf-tables-red-teaming
- NiranjMahaswar/gemini-2.5-pro-nf-tables-red-teaming
- void0red/CVE-2023-32233
- BurnSkyup/CVE-2023-32233-reproduction
- adeadukagi/CVE-2023-32233-reproduction
- Destawell/gemini-2.5-pro-nf-tables-red-teamin
- NiranjMahaswar/gemini-2.5-pro-nf-tables-red-teamin
References
- www.openwall.com/lists/oss-security/2023/05/08/4 (Patch, Mailing List, Third Party Advisory)
- github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab (Patch)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
- news.ycombinator.com/item (Issue Tracking)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Mitigation, Issue Tracking)
- www.debian.org/security/2023/dsa-5402 (vendor-advisory, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2023/05/15/5 (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/06/msg00008.html (mailing-list, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230616-0002/ (Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-32233?
- CVE-2023-32233 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-05-08.
- How severe is CVE-2023-32233?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-32233 known to be exploited?
- 53 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.