Vulnerability in Linux Kernel
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.
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: 0.055 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.055 · newest: 0.055 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/ (Patch, Mailing List, Vendor Advisory)
- lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452@randorisec…
- www.openwall.com/lists/oss-security/2022/07/02/3 (Exploit, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/07/05/1 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- www.randorisec.fr/crack-linux-firewall/ (Exploit, Third Party Advisory)
- www.debian.org/security/2022/dsa-5191 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/08/06/5 (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20220826-0004/ (Third Party Advisory)
- packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-34918?
- CVE-2022-34918 is a high-severity vulnerability in Linux Kernel, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 7.8/10. Published 2022-07-04.
- How severe is CVE-2022-34918?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2022-34918 known to be exploited?
- 88 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.