CVE-2020-15863: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2020-15863 is a medium (CVSS 5.3) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 41.2% of scored vulnerabilities.
Not severe (CVSS 5.3, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 12Timeline
- 28-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
- OSV · AlpineEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.48% 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< 1:5.0-12
- debian_linuxEOL10.0
Alpine1 product
- qemu< 5.1.0-r1
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Qemu1 product
- qemu≤ 5.0.0 | 5.1.0:rc0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm6 | < 1:2.5+dfsg-5ubuntu10.45 | < 1:2.11+dfsg-1ubuntu7.31 | < 1:4.2-3ubuntu6.4
5 vendors · 6 products
References
16 links- lists.nongnu.org/archive/html/qemu-devel/2020-07/msg03497.htmlX Refsource MISCMailing ListPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2020/07/22/1X Refsource CONFIRMMailing ListPatchThird Party Advisory
- lists.nongnu.org/archive/html/qemu-devel/2020-07/msg05745.htmlX Refsource MISCMailing ListPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00024.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
