CVE-2021-26342 Affecting kernel-firmware package, versions <20191118-150000.3.42.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-SLES150-KERNELFIRMWARE-2848021
  • published26 May 2022
  • disclosed25 May 2022

Introduced: 25 May 2022

CVE-2021-26342  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 kernel-firmware to version 20191118-150000.3.42.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-firmware package and not the kernel-firmware package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

CVSS Scores

version 3.1