The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - x86/mce: Work around an erratum on fast string copy instructions A rare kernel panic scenario can happen     when the following conditions are met due to an erratum on fast string copy instructions: 1) An     uncorrected error. 2) That error must be in first cache line of a page. 3) Kernel must execute page_copy     from the page immediately before that page. The fast string copy instructions (REP; MOVS*) could consume     an uncorrectable memory error in the cache line _right after_ the desired region to copy and raise an MCE.
    Bit 0 of MSR_IA32_MISC_ENABLE can be cleared to disable fast string copy and will avoid such spurious     machine checks. However, that is less preferable due to the permanent performance impact. Considering     memory poison is rare, it's desirable to keep fast string copy enabled until an MCE is seen. Intel has     confirmed the following: 1. The CPU erratum of fast string copy only applies to Skylake, Cascade Lake and     Cooper Lake generations. Directly return from the MCE handler: 2. Will result in complete execution of the     REP; MOVS* with no data loss or corruption. 3. Will not result in another MCE firing on the next     poisoned cache line due to REP; MOVS*. 4. Will resume execution from a correct point in code. 5. Will     result in the same instruction that triggered the MCE firing a second MCE immediately for any other     software recoverable data fetch errors. 6. Is not safe without disabling the fast string copy, as the next     fast string copy of the same buffer on the same CPU would result in a PANIC MCE. This should mitigate the     erratum completely with the only caveat that the fast string copy is disabled on the affected hyper thread     thus performance degradation. This is still better than the OS crashing on MCEs raised on an irrelevant     process due to REP; MOVS*' accesses in a kernel context, e.g., copy_page. Injected errors on 1st cache     line of 8 anonymous pages of process 'proc1' and observed MCE consumption from 'proc2' with no panic     (directly returned). Without the fix, the host panicked within a few minutes on a random 'proc2' process     due to kernel access from copy_page. [ bp: Fix comment style + touch ups, zap an unlikely(), improve the     quirk function's readability. ] (CVE-2022-49124)

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Linux Distros Unpatched Vulnerability : CVE-2022-49124

medium Nessus Plugin ID 225666

Version 1.4