CVE-2021-3545: debian debian_linux Use of Uninitialized Resource
Vulnerability summary
CVE-2021-3545 is a medium (CVSS 6.5) Use of Uninitialized Resource vulnerability in debian debian_linux. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.5% of scored vulnerabilities.
Not severe (CVSS 6.5, 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
- 02-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
37%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.42% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:6.1+dfsg-1
- debian_linuxEOL11.0
Alpine1 product
- qemu< 6.1.0-r0
Qemu1 product
- qemu≤ 6.0.0
Ubuntu1 product
- qemu< 1:4.2-3ubuntu6.17 | < 1:6.2+dfsg-2ubuntu5
4 vendors · 5 products
