CVE-2021-26342

lowpriority · track · 13EPSS 0.002 · 13 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (13th) EPSS

CVSS 2.1 · low

Is it mine?

49 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

3.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.02.1lowAV:L/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v3.13.3lowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 1.4

v3.13.1lowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USLLM-inferred

affected products (49)

Products and version ranges known to be affected.

AMD Prozessorall versionscert_bundDEcpe:/h:amd:amd_processor:-
AMD Prozessor Athlonall versionscert_bundDEcpe:/h:amd:amd_processor:athlon
AMD Prozessor EPYCall versionscert_bundDEcpe:/h:amd:amd_processor:epyc
AMD Prozessor Ryzenall versionscert_bundDEcpe:/h:amd:amd_processor:ryzen
Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
HP Computerall versionscert_bundDEcpe:/h:hp:computer:-
HPE ProLiantall versionscert_bundDEcpe:/h:hp:proliant:-
Lenovo Computerall versionscert_bundDEcpe:/o:lenovo:lenovo_computer:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
AMD EPYC™ Processorsall versionsenisa_euvdEU
amd epyc 7001 firmware< naplespi-sp3_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7001_firmware:*:*:*:*:*:*:*:*
amd epyc 7251 firmware< naplespi-sp3_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7251_firmware:*:*:*:*:*:*:*:*
amd epyc 7261 firmware< naplespi-sp3_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7261_firmware:*:*:*:*:*:*:*:*
amd epyc 7281 firmware< naplespi-sp3_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7281_firmware:*:*:*:*:*:*:*:*
amd epyc 72f3 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
amd epyc 7301 firmware< naplespi-sp3_1.0.0.hnvdUScpe:2.3:o:amd:epyc_7301_firmware:*:*:*:*:*:*:*:*
amd epyc 7313 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
amd epyc 7313p firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
amd epyc 7343 firmware< milanpi-sp3_1.0.0.7nvdUScpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*

showing 20 of 49

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-0073AMD Prozessoren: Mehrere SchwachstellenDeutsch2022-05-10csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in AMD Prozessoren ausnutzen, um seine Privilegien zu erhöhen, beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu verursachen, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und Daten zu manipulieren.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2022-05-11modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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