CVE-2025-38534

MEDIUM EPSS 2.1%
Published Aug 16, 202510mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 16, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix copy-to-cache so that it performs collection with ceph+fscache The netfs copy-to-cache that is used by Ceph with local caching sets up a new request to write data just read to the cache. The request is started and then left to look after itself whilst the app continues. The request gets notified by the backing fs upon completion of the async DIO write, but then tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn't set - but the app isn't waiting there, and so the request just hangs. Fix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the notification from the backing filesystem to put the collection onto a work queue instead.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥6.14  –  <6.15.8
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any

References 2

  • git.kernel.org https://git.kernel.org/stable/c/1ebe58cef84eab22b41b4d5e72c2051ebf00af50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c238e30774e3022a505fa54311273add7570f13
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1ebe58cef84eab22b41b4d5e72c2051ebf00af50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c238e30774e3022a505fa54311273add7570f13
    Patch