CVE-2026-46131

KVM: x86: check for nEPT/nNPT in slow flush hypercalls

At a glance

Severity: Not available
EPSS: EPSS 0.13 % · percentile 2 (2026-10-27)
State: PUBLISHED
Published: 2026-05-28
Updated: 2026-06-14
Assigner: Linux
NVD status: Undergoing Analysis

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: check for nEPT/nNPT in slow flush hypercalls Checking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa() is only valid if an L2 guest is running *with nested EPT/NPT enabled*. Instead use the same condition as translate_nested_gpa() itself.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2026-32890
GCVE · GCVE-0-2026-46131

CERT-FR advisories

CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1066 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1064 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-0731 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.2 < 6.6.140
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.7 < 6.12.88
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.13 < 6.18.30
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.19 < 7.0.7
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*

Affected products

Product	Versions
Linux · Linux	affected aee738236dca0d0870789138ec494e15d6303566 < 971f17f5d91045404e3914029ea57c3da90179a4 ; affected aee738236dca0d0870789138ec494e15d6303566 < 45fc766bc756ff1d66f8ca026a9c4f7f764adfae ; affected aee738236dca0d0870789138ec494e15d6303566 < d6f4e217d663ede5becc2fd6cb612c749677387b ; affected aee738236dca0d0870789138ec494e15d6303566 < 4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57 ; affected aee738236dca0d0870789138ec494e15d6303566 < 464af6fc2b1dcc74005b7f58ee3812b17777efee
Linux · Linux	affected 6.2 ; unaffected 0 < 6.2 ; unaffected 6.6.140 ≤ 6.6.* ; unaffected 6.12.88 ≤ 6.12.* ; unaffected 6.18.30 ≤ 6.18.* ; unaffected 7.0.7 ≤ 7.0.*

Product

Versions

Linux · Linux

affected aee738236dca0d0870789138ec494e15d6303566 < 971f17f5d91045404e3914029ea57c3da90179a4 ; affected aee738236dca0d0870789138ec494e15d6303566 < 45fc766bc756ff1d66f8ca026a9c4f7f764adfae ; affected aee738236dca0d0870789138ec494e15d6303566 < d6f4e217d663ede5becc2fd6cb612c749677387b ; affected aee738236dca0d0870789138ec494e15d6303566 < 4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57 ; affected aee738236dca0d0870789138ec494e15d6303566 < 464af6fc2b1dcc74005b7f58ee3812b17777efee

Linux · Linux

affected 6.2 ; unaffected 0 < 6.2 ; unaffected 6.6.140 ≤ 6.6.* ; unaffected 6.12.88 ≤ 6.12.* ; unaffected 6.18.30 ≤ 6.18.* ; unaffected 7.0.7 ≤ 7.0.*

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD