PT-2025-20513 · Linux+4 · Linux Kernel+4

Published 2025-02-10 · Updated 2026-05-26 · CVE-2025-37863

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Description The issue is related to the overlayfs in the Linux kernel, where it was possible for the upper layer to directly refer to a data layer without a lowerdir, which could result in an Oops. This was originally not allowed when data-only layers were introduced but was later introduced by the "datadir+" feature without proper handling.

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

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2025-11931

CVE-2025-37863

OESA-2025-2767

USN-7594-1

USN-7594-2

USN-7594-3

USN-8028-1

USN-8028-2

USN-8028-3

USN-8028-4

USN-8028-5

USN-8028-6

USN-8028-7

USN-8028-8

USN-8031-1

USN-8031-2

USN-8031-3

USN-8052-1

USN-8052-2

USN-8074-1

USN-8074-2

USN-8126-1

Affected Products

Astra Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 1484

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37863.json · Exploit
• https://ubuntu.com/security/CVE-2025-40333 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22072 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40294 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68222 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40123 · Security Note
• https://ubuntu.com/security/CVE-2025-38396 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38335 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38349 · Security Note
• https://ubuntu.com/security/CVE-2025-38576 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40325 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38037 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22073 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40106 · Vendor Advisory