CVE•Published 2021-09-19•2 articles on news•6 live references•NVD data
CVE-2021-41073
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
7.8
HIGH
EPSS percentile
78
Exploit Prediction Scoring System · top 22% of all CVEs
Description
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
Timeline
Published 2021-09-19
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-2021-41073Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Netapp Cloud Backup"All exposed Netapp Cloud Backup instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Cloud Backup"HTTP body or banner mentions "Cloud Backup" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-41073Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-41073Censys host search filtered to this CVE id.
grep.app
CVE-2021-41073Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-41073GitHub code search for direct mentions.
Google dork
"CVE-2021-41073" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (5)
CVE-2021-410735 repos
xairy/linux-kernel-exploitationunknown
A collection of links related to Linux kernel security and exploitation
bsauce/kernel-exploit-factoryC
Linux kernel CVE exploit analysis report and relative debug environment. You don't need to compile Linux kernel and configure your environment anymore.
bsauce/kernel-security-learningC
Anything about kernel security. CTF kernel pwn, kernel exploit, kernel fuzz and kernel defense paper, kernel debugging technique, kernel CVE debug.
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
star-sg/CVEC
A collection of proof-of-concept exploit scripts written by the STAR Labs team for various CVEs that they discovered or found by others.