CVE-2019-19947

In the Linux kernel through 5.4.6, there are information leaks of uninitialized memory to a USB device in the drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c driver, aka CID-da2311a6385c.

Published: 2019-12-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-19947 is rated Low Risk (32.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.49%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-19947

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.08% 0.49% +0.42%
2 2025-03-30 0.27% 0.08% -0.19%
3 2025-03-29 — 0.27% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-19947

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.6 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.9 3.6 [email protected]
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2019-19947

OS Trackers for CVE-2019-19947

vendor priority summary link
debian not yet assigned CVE-2019-19947 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-19947
redhat medium — https://access.redhat.com/security/cve/CVE-2019-19947
suse medium — https://www.suse.com/security/cve/CVE-2019-19947/
ubuntu low CVE-2019-19947 low priority: Ubuntu including 112 source packages (linux, linux-aws, …), 1174 status rows across 13 suites (bionic, disco, eoan, focal, groovy, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 832, not-affected 162, released 157, ignored 23. https://ubuntu.com/security/CVE-2019-19947

Affected software / configurations for CVE-2019-19947

Vendor Product Version Raw CPE
linux linux_kernel <= 5.4.6 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.10 cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
netapp cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
netapp data_availability_services — cpe:2.3:a:netapp:data_availability_services:-:*:*:*:*:*:*:*
netapp e-series_santricity_os_controller >= 11.0, <= 11.70.2 cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
netapp fas\/aff_baseboard_management_controller — cpe:2.3:a:netapp:fas\/aff_baseboard_management_controller:-:*:*:*:*:*:*:*
netapp hci_baseboard_management_controller h610s cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*
netapp solidfire_\&_hci_management_node — cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
netapp steelstore_cloud_integrated_storage — cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
netapp aff_baseboard_management_controller a700s cpe:2.3:h:netapp:aff_baseboard_management_controller:a700s:*:*:*:*:*:*:*
netapp solidfire_baseboard_management_controller — cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*

References for CVE-2019-19947

cvelogic Threat Intelligence