PT-2025-33577 · Fscache+5 · Fscache+5

Published 2025-07-11 · Updated 2025-12-15 · CVE-2025-38534

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: The netfs copy-to-cache mechanism, used by Ceph with local caching, incorrectly handles asynchronous Direct I/O (DIO) write completion notifications. Specifically, when a request is initiated to write data read to the cache, the request may hang because the application is not waiting for the notification and NETFS RREQ OFFLOAD COLLECTION is not set. This issue occurs during collection with Ceph and fscache.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2026-03247

CVE-2025-38534

USN-7879-1

USN-7879-2

USN-7879-3

USN-7879-4

USN-7880-1

USN-7934-1

Affected Products

Astra Linux

Ceph

Linuxmint

Linux Kernel

Ubuntu

Fscache

References · 231

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38534.json · Exploit
• https://ubuntu.com/security/CVE-2025-38612 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38515 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38666 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38664 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38473 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38526 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38507 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7879-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38351 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38585 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38561 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38491 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38628 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38619 · Vendor Advisory