CVE-2022-34918

An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

5.5% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-25)

CWE

CWE-843

Published

2022-07-04

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• canonical:ubuntu_linux
• debian:debian_linux
• linux:linux_kernel
• netapp:h300s_firmware
• netapp:h410c_firmware
• netapp:h410s_firmware
• netapp:h500s_firmware
• netapp:h700s_firmware

References

• http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
• http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.html
• http://www.openwall.com/lists/oss-security/2022/07/05/1
• http://www.openwall.com/lists/oss-security/2022/08/06/5
• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6

Check your stackJSON