MEDIUM
CVE-2021-3947
CWE-125Published: February 18, 2022· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.
Technical Analysis
CVE-2021-3947 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
qemu1 product(s)
qemu
Source: NVD CPE · 2 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
https://bugzilla.redhat.com/show_bug.cgi?id=2021869Issue Tracking · Patch · Vendor Advisory
→
https://security.gentoo.org/glsa/202208-27Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20220318-0003/Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2021869Issue Tracking · Patch · Vendor Advisory
→
https://security.gentoo.org/glsa/202208-27Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20220318-0003/Third Party Advisory
Quick Facts
CVE IDCVE-2021-3947
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 18, 2022
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-3947 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.