PT-2025-33773 · Linux+5 · Linux Kernel+5

Syzbot · Published 2025-07-29 · Updated 2026-05-26 · CVE-2025-38574

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description: The Linux kernel contains a flaw within the pptp xmit() function related to insufficient checks on the size of the skb data structure. This can lead to reading uninitialized data, as reported by syzbot. The commit aabc6596ffb3 addressed a similar issue in ppp sync txmunge(), highlighting the need for a corresponding fix in pptp xmit(). The issue manifests as a KMSAN uninit-value bug within the pptp xmit() function.

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

Exploit

DoS

Use of Uninitialized Resource

Weakness Enumeration

CWE-457

CWE-908

Related Identifiers

AZL-66476

AZL-73857

BDU:2025-15172

CVE-2025-38574

DLA-4327-1

DLA-4328-1

ECHO-C851-BC9B-D545

MGASA-2025-0234

MGASA-2025-0235

OESA-2025-2268

OESA-2025-2269

OESA-2025-2270

OESA-2026-1341

OPENSUSE-SU-2025:20081-1

SUSE-SU-2025:03600-1

SUSE-SU-2025:03601-1

SUSE-SU-2025:03602-1

SUSE-SU-2025:03614-1

SUSE-SU-2025:03633-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:21074-1

SUSE-SU-2025:21139-1

SUSE-SU-2025:21179-1

SUSE-SU-2025:3725-1

SUSE-SU-2025:3751-1

USN-7879-1

USN-7879-2

USN-7879-3

USN-7879-4

USN-7880-1

USN-7909-1

USN-7909-2

USN-7909-3

USN-7909-4

USN-7909-5

USN-7910-1

USN-7910-2

USN-7933-1

USN-7934-1

USN-7938-1

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

Debian

Linuxmint

Linux Kernel

Red Os

Suse

Ubuntu

References · 3407

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38574.json · Exploit
• https://ubuntu.com/security/CVE-2025-40333 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68222 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38396 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38576 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38068 · Security Note
• https://ubuntu.com/security/CVE-2025-39734 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22128 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68183 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-23157 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23038 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:03601-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38642 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38217 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39795 · Vendor Advisory