CVE-2017-16845: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2017-16845 is a critical (CVSS 10.0) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 2.94% chance of exploitation in the next 30 days, higher than 87.1% of scored vulnerabilities.
Severe, CVSS 10 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 17-11-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-of-bounds access.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated10.0CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated10.0CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H
EPSS trend
Probability
2.94%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.94% 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< 1:2.12~rc3+dfsg-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10 | 18.04
Qemu1 product
- qemu≤ 2.11.2
Ubuntu1 product
- qemu< 1:2.5+dfsg-5ubuntu10.22 | < 1:2.11+dfsg-1ubuntu7.1
4 vendors · 5 products
References
11 links
lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.gnu.org/archive/html/qemu-devel/2017-11/msg02982.htmlMailing ListX Refsource MLISTPatchThird Party AdvisoryREPORT