CVE-2023-32233
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)13%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edab ↗
Additional information
- NVD record
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlPatch
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edabPatch
- https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edabPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=2196105Advisory
- http://www.openwall.com/lists/oss-security/2023/05/15/5Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlAdvisory
- https://news.ycombinator.com/item?id=35879660