What’s Vulnerable › Vulnerabilities
CVE-2022-32250
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2022-06-02 · updated 2026-10-14
- Weakness: CWE-416
Description
net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to a use-after-free.
Affected products
- Debian Linux: 9.0, 10.0
- Fedoraproject Fedora: 35, 36
- Linux kernel: from 4.1 before 4.9.318; from 4.10 before 4.14.283; from 4.15 before 4.19.247; from 4.20 before 5.4.198; from 5.5 before 5.10.120; from 5.11 before 5.15.45 — fixed in 4.14.283, 4.19.247, 4.9.318, 5.10.120, 5.15.45, 5.17.13
- NetApp H300S Firmware: all versions
- NetApp H410C Firmware: all versions
- NetApp H410S Firmware: all versions
- NetApp H500S Firmware: all versions
- NetApp H700S Firmware: all versions
How to fix
Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 4.9.318, 5.10.120. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2022/06/03/1
- http://www.openwall.com/lists/oss-security/2022/06/04/1
- http://www.openwall.com/lists/oss-security/2022/06/20/1
- http://www.openwall.com/lists/oss-security/2022/07/03/5
- http://www.openwall.com/lists/oss-security/2022/07/03/6
- http://www.openwall.com/lists/oss-security/2022/08/25/1
- http://www.openwall.com/lists/oss-security/2022/09/02/9
- https://blog.theori.io/research/CVE-2022-32250-linux-kernel-lpe-2022/
- https://bugzilla.redhat.com/show_bug.cgi?id=2092427
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd
- https://github.com/theori-io/CVE-2022-32250-exploit
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
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