Out-of-bounds Read in Qemu
CVE-2021-3947
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Qemu — versions 6.2.0
- N/a Qemu — versions qemu-kvm 6.2.0-rc2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-3947?
- CVE-2021-3947 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2022-02-18.
- How severe is CVE-2021-3947?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-3947 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.