CVE-2017-2620: citrix xenserver Out-of-bounds Write
Vulnerability summary
CVE-2017-2620 is a critical (CVSS 9.9) Out-of-bounds Write vulnerability in citrix xenserver. EPSS estimates a 3.56% chance of exploitation in the next 30 days, higher than 89.3% of scored vulnerabilities.
Not severe (CVSS 5.5, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 27 · Related 13Timeline
- 27-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.
CVSS metrics
7 scores · 6 sources · 2 versions- CVE.orgCNA5.5MediumCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:LDiffers
- OSV · AlpineEcosystem advisory · calculated9.9CriticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- OSV · Red hatEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:LDiffers
- OSV · DebianEcosystem advisory · calculated9.9CriticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
3.56%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.56% 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: adjacent network, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat15 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
- enterprise_linux_workstation6.0 | 7.0
Debian3 products
- qemu< 1:2.8+dfsg-3
- xen< 4.4.0-1
- debian_linuxEOL7.0
Alpine2 products
- qemu< 2.8.1-r1 | < 2.8.1.1-r0
- xen< 4.7.1-r5 | < 4.6.3-r8 | < 4.6.3-r10
Qemu2 products
- qemu< 2.8.0
- qemu:2.8
Ubuntu2 products
- qemu< 2.0.0+dfsg-2ubuntu1.33 | < 1:2.5+dfsg-5ubuntu10.11
- xen< 4.4.2-0ubuntu0.14.04.11
Citrix1 product
- xenserver6.0.2 | 6.2.0:sp1 | 6.5:sp1 | 7.0 | 7.1
Xen1 product
- xen≤ 4.7.1 | 4.7.1:r1 | 4.7.1:r2 | 4.7.1:r3 | 4.7.1:r4 | 4.7.1:r5 | 4.7.1:r6 | 4.7.1:r7
7 vendors · 26 products
References
36 linksShow all 36 references
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2620X Refsource CONFIRMIssue TrackingThird Party Advisory
lists.debian.org/debian-lts-announce/2018/02/msg00005.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.gnu.org/archive/html/qemu-devel/2017-02/msg04700.htmlMailing ListX Refsource MLISTPatchThird Party Advisory
