CVE-2021-3409: debian debian_linux
Vulnerability summary
CVE-2021-3409 is a medium (CVSS 5.7) vulnerability in debian debian_linux. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 42.1% of scored vulnerabilities.
Not severe (CVSS 5.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 7Timeline
- 23-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated5.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
- OSV · AlpineEcosystem advisory · calculated5.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
EPSS trend
Probability
0.49%
Chance of exploitation in the next 30 days
Percentile
42%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.49% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:5.2+dfsg-10
- debian_linuxEOL9.0
Alpine1 product
- qemu< 6.0.0-r1
Fedoraproject1 product
- fedoraEOL33
Qemu1 product
- qemu≤ 5.2.0
Redhat1 product
- enterprise_linuxEOL7.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm6 | < 1:2.5+dfsg-5ubuntu10.51+esm4 | < 1:2.11+dfsg-1ubuntu7.37 | < 1:4.2-3ubuntu6.17
6 vendors · 7 products
References
14 links- www.openwall.com/lists/oss-security/2021/03/09/1X Refsource MISCREPORTMailing ListPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing ListX Refsource MLISTThird Party Advisory
