PT-2019-5421 · Linux+5 · Linux Kernel+5
Anthony Steinhauser
·
Published
2019-11-14
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Updated
2021-05-28
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CVE-2019-18660
CVSS v3.1
4.7
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.4.1
Description
The issue is related to Information Exposure due to the lack of Spectre-RSB mitigation for all applicable CPUs. This concern is tied to the components arch/powerpc/kernel/entry 64.S and arch/powerpc/kernel/security.c in the Linux kernel. The vulnerability allows an attacker to potentially gain unauthorized access to information by exploiting data left in the processor cache due to speculative instruction execution.
Recommendations
For Linux kernel versions prior to 5.4.1, update to version 5.4.1 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive information and resources until the update can be applied.
Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu