CVE-2020-13765: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2020-13765 is a medium (CVSS 6.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 2.46% chance of exploitation in the next 30 days, higher than 84.4% of scored vulnerabilities.
Not severe (CVSS 5.6, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 10Timeline
- 04-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two addresses, which allows attackers to trigger an invalid memory copy operation.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · DebianEcosystem advisory · calculated5.6MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- NVDNIST5.6MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · AlpineEcosystem advisory · calculated5.6MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS trend
Probability
2.46%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
Increase +0.06 pp
From 2.40% 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, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:4.2-1
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- qemu< 4.2.0-r0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Qemu1 product
- qemu4.0.0 | 4.1.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm4 | < 1:2.5+dfsg-5ubuntu10.45 | < 1:2.11+dfsg-1ubuntu7.31
5 vendors · 6 products
References
13 links- www.openwall.com/lists/oss-security/2020/06/03/6X Refsource CONFIRMREPORTMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2020/06/msg00032.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing ListX Refsource MLISTThird Party Advisory
- github.com/qemu/qemu/commit/4f1c6cb2f9afafda05eab150fd2bd284edce6676X Refsource MISCPatchThird Party Advisory