HOMEVULNERABILITIESCVE-2020-25085
MEDIUM

CVE-2020-25085

CWE-787Published: September 25, 2020· Updated: Jun 17, 2026

5.0
CVSS v3.1

Official Description

QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case.

NVD Source

Technical Analysis

CVE-2020-25085 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.High
User InteractionNone
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L

Affected Vendors & Products

Debian1 product(s)
debian linux
qemu1 product(s)
qemu
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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Official Patches & Advisories

All References (14)

http://www.openwall.com/lists/oss-security/2020/09/16/6Mailing List · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/09/1Mailing List · Patch · Third Party Advisory
https://bugs.launchpad.net/qemu/+bug/1892960Exploit · Issue Tracking · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/09/16/6Mailing List · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/03/09/1Mailing List · Patch · Third Party Advisory
https://bugs.launchpad.net/qemu/+bug/1892960Exploit · Issue Tracking · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-25085
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-787
CISA KEVNo
Affected2 vendor(s)
PublishedSep 25, 2020

Related CVEs (CWE-787)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2020-25085 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.