01 Record

CVE-2026-31588

KVM: x86: Use scratch field in MMIO fragment to hold small write values

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

View raw JSON

02 Description

KVM: x86: Use scratch field in MMIO fragment to hold small write values

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.13% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 2.8% of scored records. A rank, not a probability.
NVD base score: 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-24 14:42Z4 MO AGO

Last updated

2026-08-05 12:23Z1 MO AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant
CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

a2708479b135b9d2e39c150ee359ed9a92be7baec7d9ef668b3dbb83ee596ccd

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxf78146b0f9230765c6315b2e14f56112513389ad to < 019d0bd32b9a4646ba35d904907452039e2db700, f78146b0f9230765c6315b2e14f56112513389ad to < 4569c66dd9e94a22cd0796b6514a8b25ffff16a1, f78146b0f9230765c6315b2e14f56112513389ad to < 52570e73d48f1c73836d37e594667117b4c2a5a8, f78146b0f9230765c6315b2e14f56112513389ad to < dc6a6c3db3a4eca7e747cfc46e22c08d016c68f7, f78146b0f9230765c6315b2e14f56112513389ad to < b5a02d37eb0739f462fa12df449ab9b3480c783b, f78146b0f9230765c6315b2e14f56112513389ad to < 22d2ff69d487a32a8b88f9c970120fc2daa08a77, f78146b0f9230765c6315b2e14f56112513389ad to < 2b83d91e9ae92fe1258d7040a32430bbb3bb7d6e, f78146b0f9230765c6315b2e14f56112513389ad to < 3a7b6d75c8f85b09dea893f64a85a356bcf6c3fe, f78146b0f9230765c6315b2e14f56112513389ad to < 0b16e69d17d8c35c5c9d5918bf596c75a44655d3, 3.5—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/019d0bd32b9a4646ba35d904907452039e2db700
git.kernel.orghttps://git.kernel.org/stable/c/4569c66dd9e94a22cd0796b6514a8b25ffff16a1
git.kernel.orghttps://git.kernel.org/stable/c/52570e73d48f1c73836d37e594667117b4c2a5a8
git.kernel.orghttps://git.kernel.org/stable/c/dc6a6c3db3a4eca7e747cfc46e22c08d016c68f7
git.kernel.orghttps://git.kernel.org/stable/c/b5a02d37eb0739f462fa12df449ab9b3480c783b
git.kernel.orghttps://git.kernel.org/stable/c/22d2ff69d487a32a8b88f9c970120fc2daa08a77
git.kernel.orghttps://git.kernel.org/stable/c/2b83d91e9ae92fe1258d7040a32430bbb3bb7d6e
git.kernel.orghttps://git.kernel.org/stable/c/3a7b6d75c8f85b09dea893f64a85a356bcf6c3fe
git.kernel.orghttps://git.kernel.org/stable/c/0b16e69d17d8c35c5c9d5918bf596c75a44655d3

01 Record index

CVE-2026-31588

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-31588

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References