CVE-2020-35517: qemu Improper Privilege Management
Vulnerability summary
CVE-2020-35517 is a high (CVSS 8.2) Improper Privilege Management vulnerability in qemu. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 45% of scored vulnerabilities. 2 public exploits are recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 28-01-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated8.2HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated8.2HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.53% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
2 foundExploit Reference (openwall.com)
Maturity: unknown
Exploit Reference (lists.gnu.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat197 products
- hivex< 0:1.3.18-20.module+el8.3.0+6423+e4cb6418 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- hivex-debuginfo< 0:1.3.18-20.module+el8.3.0+6423+e4cb6418 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- hivex-debugsource< 0:1.3.18-20.module+el8.3.0+6423+e4cb6418 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- hivex-devel< 0:1.3.18-20.module+el8.3.0+6423+e4cb6418 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- libguestfs< 1:1.40.2-25.module+el8.3.0+7421+642fe24f | < 1:1.40.2-24.module+el8.2.1+7154+47ffd890
Alpine1 product
- qemu≥ 5.0.0, < 5.2.0-r0
Debian1 product
- qemu< 1:5.2+dfsg-5
Qemu1 product
- qemu≥ 5.0.0, ≤ 5.2.50
4 vendors · 200 products · Showing 200 of 218
References
17 links- github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2cX Refsource MISCPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1915823X Refsource MISCREPORTIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/01/22/1X Refsource MISCARTICLEExploitMailing ListPatchThird Party Advisory
- lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.htmlX Refsource MISCExploitMailing ListPatchThird Party Advisory
Show all 17 references
- virtio-fs.gitlab.ioARTICLE