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Diffstat (limited to 'Documentation/admin-guide/hw-vuln/old_microcode.rst')
| -rw-r--r-- | Documentation/admin-guide/hw-vuln/old_microcode.rst | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/admin-guide/hw-vuln/old_microcode.rst b/Documentation/admin-guide/hw-vuln/old_microcode.rst new file mode 100644 index 000000000000..6ded8f86b8d0 --- /dev/null +++ b/Documentation/admin-guide/hw-vuln/old_microcode.rst @@ -0,0 +1,21 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============= +Old Microcode +============= + +The kernel keeps a table of released microcode. Systems that had +microcode older than this at boot will say "Vulnerable". This means +that the system was vulnerable to some known CPU issue. It could be +security or functional, the kernel does not know or care. + +You should update the CPU microcode to mitigate any exposure. This is +usually accomplished by updating the files in +/lib/firmware/intel-ucode/ via normal distribution updates. Intel also +distributes these files in a github repo: + + https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files.git + +Just like all the other hardware vulnerabilities, exposure is +determined at boot. Runtime microcode updates do not change the status +of this vulnerability. |