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CVE-2025-21687— vfio/platform: check the bounds of read/write syscalls

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于vfio/platform驱动中read/write系统调用的边界检查缺失。

CVSS 7.8 · High EPSS 0.24% · P14

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux 6e3f264560099869f68830cb14b3b3e71e5ac76a< f21636f24b6786c8b13f1af4319fa75ffcf17f38 affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< 9377cdc118cf327248f1a9dde7b87de067681dc9 affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< d19a8650fd3d7aed8d1af1d9a77f979a8430eba1 affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< ed81d82bb6e9df3a137f2c343ed689e6c68268ef affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< 92340e6c5122d823ad064984ef7513eba9204048 affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< f65ce06387f8c1fb54bd59e18a8428248ec68eaf affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< 6bcb8a5b70b80143db9bf12dfa7d53636f824d53 affected
6e3f264560099869f68830cb14b3b3e71e5ac76a< 1485932496a1b025235af8aa1e21988d6b7ccd54 affected
… +18 more rows
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I. Basic Information for CVE-2025-21687

Vulnerability Information
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Vulnerability Title
vfio/platform: check the bounds of read/write syscalls
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vfio/platform: check the bounds of read/write syscalls count and offset are passed from user space and not checked, only offset is capped to 40 bits, which can be used to read/write out of bounds of the device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于vfio/platform驱动中read/write系统调用的边界检查缺失。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 6e3f264560099869f68830cb14b3b3e71e5ac76a ~ f21636f24b6786c8b13f1af4319fa75ffcf17f38 -
Linux Linux 4.1 -

II. Public POCs for CVE-2025-21687

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III. Intelligence Information for CVE-2025-21687

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Patches & Fixes for CVE-2025-21687 (12)

Other References for CVE-2025-21687 (3)

Same Patch Batch · Linux · 2025-02-10 · 8 CVEs total

CVE-2025-21692 7.8 HIGH net: sched: fix ets qdisc OOB Indexing
CVE-2025-21693 7.8 HIGH mm: zswap: properly synchronize freeing resources during CPU hotunplug
CVE-2024-57950 drm/amd/display: Initialize denominator defaults to 1
CVE-2025-21689 USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()
CVE-2025-21688 drm/v3d: Assign job pointer to NULL before signaling the fence
CVE-2025-21690 scsi: storvsc: Ratelimit warning logs to prevent VM denial of service
CVE-2025-21691 cachestat: fix page cache statistics permission checking

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21687

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