CVE-2021-3409

mediumpriority · track · 23EPSS 0.005 · 42 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.49% (42nd) EPSS
CVSS 4.6 · medium
Is it mine?
18 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of service or potential code execution. QEMU up to (including) 5.2.0 is affected by this.

01

cvss

Technical severity, 0–10. One row per scoring source.

5.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4
v3.15.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 1.5 · impact 3.7
v3.15.7mediumAV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU
v3.15.2mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119US
03

affected products (18)

Products and version ranges known to be affected.

04

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2022-1101QEMU: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit den Rechten des DienstesDeutsch2021-03-09csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in QEMU ausnutzen, um beliebigen Programmcode mit den Rechten des Dienstes auszuführen.

05

also known as (4)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdNVDCVE.orgMITRE
published 2021-03-23modified 2026-06-17
08

references (25)

External citations — patches, advisories, analysis.

scry

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