CVE•Published 2025-04-17•Modified 2026-08-04•1 article on news•5 live references•NVD data
CVE-2021-47668Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
8
Exploit Prediction Scoring System · top 92% of all CVEs
Weaknesses (CWE)
Description
In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.
Timeline
Published 2025-04-17
Modified 2026-08-04
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-47668Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Linux Kernel"Hosts Shodan identified as running Linux Kernel.
More intel sources (5)
Shodan report
vuln:CVE-2021-47668Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-47668Censys host search filtered to this CVE id.
grep.app
CVE-2021-47668Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-47668GitHub code search for direct mentions.
Google dork
"CVE-2021-47668" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (3)
CVE-2021-476683 repos
DarkFunct/TK-CVE-RepoPython
TK-CVE-Repo
1dayexploit/1day-archivePython
Technical deep-dives and root cause analyses of recently disclosed CVEs - reverse engineering patches, building proof-of-concepts, and documenting exploitation techniques in the 1-…
GODofExploit/exploit-arsenalPython
434 standalone Python-3 (stdlib-only) CVE exploits, each live-validated end-to-end against real vulnerable software with a write-up and a real-run screenshot. 102 in the CISA KEV c…