CVE-2025-38357

Local cross-file disclosure via stale DAX mappings

Published Jul 25, 2025 · Updated Aug 5, 2026

Memory corruption in Linux 6.15 through 6.15.4 allows local users to read or corrupt file data through a DAX-backed virtiofs mount. The FUSE inode-eviction path calls truncate_inode_pages_final without first breaking DAX layouts and waiting for pinned pages to become idle, allowing freed window ranges to be reassigned while DMA remains active. Ordinary file access to the mounted filesystem is sufficient; stale access can affect another file and crash the kernel.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Linux 6.15 through 6.15.4 allows local users to read or corrupt file data through a DAX-backed virtiofs mount. The FUSE inode-eviction path calls truncate_inode_pages_final without first breaking DAX layouts and waiting for pinned pages to become idle, allowing freed window ranges to be reassigned while DMA remains active. Ordinary file access to the mounted filesystem is sufficient; stale access can affect another file and crash the kernel.

The record

CVE
CVE-2025-38357
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.15
  2. Affected versionversion=bde708f1a65d025c45575bfe1e7bf7bdf7e71e87 <b48878aee8e7311411148c7a67c8f0b02f571d75
  3. Affected versionversion=bde708f1a65d025c45575bfe1e7bf7bdf7e71e87 <befd9a71d859ea625eaa84dae1b243efb3df3eca

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=bde708f1a65d025c45575bfe1e7bf7bdf7e71e87 <b48878aee8e7311411148c7a67c8f0b02f571d75; version=bde708f1a65d025c45575bfe1e7bf7bdf7e71e87 <befd9a71d859ea625eaa84dae1b243efb3df3eca

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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