CVE-2021-46283: linux linux_kernel Improper Initialization
Vulnerability summary
CVE-2021-46283 is a medium (CVSS 5.5) Improper Initialization vulnerability in linux linux_kernel. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 11-01-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to cause a denial of service (NULL pointer dereference and general protection fault) because of the missing initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own namespace.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.32%
Chance of exploitation in the next 30 days
Percentile
23%
Versus all other CVEs
30-day change
0.00 pp
From 0.32% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu30 products
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11< 5.11.0-1017.18~20.04.1
- linux-aws-5.3All versions (No fix recorded)
- linux-aws-5.8All versions (No fix recorded)
- linux-azureAll versions (No fix recorded)
Debian1 product
- linux< 5.14.6-1
Linux1 product
- linux_kernel< 5.12.13
3 vendors · 32 products
References
7 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13X Refsource MISCREPORTRelease NotesVendor Advisory
- syzkaller.appspot.com/bug?id=22c3987f75a7b90e238a26b5a5920525c2d1f345X Refsource MISCREPORTThird Party Advisory
