01 Record

CVE-2025-39823

KVM: x86: use array_index_nospec with indices that come from guest

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

KVM: x86: use array_index_nospec with indices that come from guest

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: 0.18% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 7.5% of scored records. A rank, not a probability.
NVD base score: 7.8 (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:U/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

2025-09-16 13:00Z11 MO AGO

Last updated

2026-05-12 12:07Z3 MO AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-129Improper Validation of Array IndexVariant

Data version

5.2

Document digest

8cf5e9111021d3be4fd380b60d2ced01cdaa133d3677f71c1762fa90d5f3ec7f

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4180bf1b655a791a0a6ef93a2ffffc762722c782 to < 72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < 31a0ad2f60cb4816e06218b63e695eb72ce74974, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < d51e381beed5e2f50f85f49f6c90e023754efa12, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < 33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < f49161646e03d107ce81a99c6ca5da682fe5fb69, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < 67a05679621b7f721bdba37a5d18665d3aceb695, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < f57a4bd8d6cb5af05b8ac1be9098e249034639fb, 4180bf1b655a791a0a6ef93a2ffffc762722c782 to < c87bd4dd43a624109c3cc42d843138378a7f4548, 4.19—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48
git.kernel.orghttps://git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974
git.kernel.orghttps://git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754efa12
git.kernel.orghttps://git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f
git.kernel.orghttps://git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5fb69
git.kernel.orghttps://git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb695
git.kernel.orghttps://git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e249034639fb
git.kernel.orghttps://git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4548
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-032379.html

01 Record index

CVE-2025-39823

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-39823

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References