CVE-2020-10761: canonical ubuntu_linux Reachable Assertion
Vulnerability summary
CVE-2020-10761 is a medium (CVSS 5.0) Reachable Assertion vulnerability in canonical ubuntu_linux. EPSS estimates a 1.80% chance of exploitation in the next 30 days, higher than 78.4% of scored vulnerabilities.
Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 09-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
- NVDNIST5.0MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
EPSS trend
Probability
1.80%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.80% 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: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Debian1 product
- qemu< 1:5.0-6
Opensuse1 product
- leapEOL15.2
Qemu1 product
- qemu< 5.0.1
Red hat1 product
- qemu:all QEMU versions before QEMU 5.0.1
Redhat1 product
Ubuntu1 product
- qemu< 1:4.2-3ubuntu6.4
7 vendors · 7 products
References
12 links- www.openwall.com/lists/oss-security/2020/06/09/1X Refsource MISCREPORTMailing ListPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761X Refsource CONFIRMIssue TrackingThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
