CVE-2020-25723: debian debian_linux Reachable Assertion
Vulnerability summary
CVE-2020-25723 is a low (CVSS 3.2) Reachable Assertion vulnerability in debian debian_linux. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 30.3% of scored vulnerabilities.
Not severe (CVSS 3.2, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 28 · Related 24Timeline
- 02-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated3.2LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
- OSV · UbuntuEcosystem advisory · calculated3.2LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated3.2LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
- OSV · AlpineEcosystem advisory · calculated3.2LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
30%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.36% 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
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.
Redhat176 products
- hivex< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab
- hivex-debuginfo< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab
- hivex-debugsource< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab
- hivex-devel< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab
- libguestfs< 1:1.38.4-15.module+el8.2.0+5297+222a20af
Debian2 products
- qemu< 1:5.2+dfsg-1
- debian_linuxEOL10.0
Alpine1 product
- qemu< 5.2.0-r0
Qemu1 product
- qemu≤ 5.1.1
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm6 | < 1:2.5+dfsg-5ubuntu10.48 | < 1:2.11+dfsg-1ubuntu7.34 | < 1:4.2-3ubuntu6.10
5 vendors · 181 products
References
15 links- bugzilla.redhat.com/show_bug.cgi?id=1898579X Refsource MISCREPORTIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2020/12/22/1Mailing ListX Refsource MLISTPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListX Refsource MLISTThird Party Advisory