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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 13.4%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 13.44% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · redhat/enterprise linux · netapp/hci baseboard management controller
- Source
- cve@mitre.org
EPSS 13.4% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlPatch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/05/15/5Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2196105Issue Tracking, Mitigation, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edabMailing List, Patch
- 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 List, Third Party Advisory
- https://news.ycombinator.com/item?id=35879660Issue Tracking
- https://security.netapp.com/advisory/ntap-20230616-0002/Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/05/08/4Mailing List, Patch, Third Party Advisory
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlPatch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/05/15/5Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2196105Issue Tracking, Mitigation, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edabMailing List, Patch
- 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 List, Third Party Advisory
- https://news.ycombinator.com/item?id=35879660Issue Tracking
- https://security.netapp.com/advisory/ntap-20230616-0002/Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/05/08/4Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-806742.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.