CVE-2019-15214
Description
A vulnerability was found in the Linux kernel’s core sound driver code. A use-after-free in a race condition between disconnection events could allow a local attacker who can trigger disconnection events (remove or add hardware) to crash the system, corrupt memory, or escalate privileges.
Mitigation
As the snd module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:
# echo "install snd /bin/true" >> /etc/modprobe.d/disable-snd.conf
The system will need to be restarted if the snd modules are loaded. In most circumstances, the snd kernel modules will be unable to be unloaded while they are is in use.
If the system requires this module to work correctly, this mitigation may not be suitable.
If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.4 | 6.4 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | High | High | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
Use-after-free could likely trigger memory corruption or privilege escalation, Confidentiality, Integrity, and Availability.
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