CVE-2021-26342
Description
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.
Risk Information
Base Score
3.3
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS Score
Exploitation Probability
0.119
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| SUSE-SU-2022:1846-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-firmware-20190618-5.25.2.noarch.rpm | Linux |
| SUSE-SU-2022:1846-1(SUSE Linux Enterprise Server 12-SP5 ) ucode-amd-20190618-5.25.2.noarch.rpm | Linux |
| SUSE-SU-2022:1840-1(SUSE Linux Enterprise Module for Basesystem 15-SP3 ) ucode-amd-20210208-150300.4.10.1.noarch.rpm | Linux |
| SUSE-SU-2022:1840-1(SUSE Linux Enterprise Module for Basesystem 15-SP3 ) kernel-firmware-20210208-150300.4.10.1.noarch.rpm | Linux |
Patch Details
No records foundReferences
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234