PT-2026-44305 · Linux · Linux Kernel

CVE-2026-46182 · Published 2026-05-28 · Updated 2026-07-28

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 A kernel stack memory leak occurs in the pseries/papr-hvpipe component. The hdr variable is allocated on the stack, but only hdr.version and hdr.flags are explicitly initialized. Since the struct papr hvpipe hdr contains reserved padding bytes (reserved[3] and reserved2[40]), uninitialized bytes can be leaked to userspace during the copy to user() function call.

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

Exploit

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-46182

OPENSUSE-SU-2026:10954-1

USN-8566-1

USN-8568-1

USN-8569-1

USN-8593-1

USN-8603-1

USN-8618-1

Affected Products

Linux Kernel

References · 1402

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46182.json · Exploit
• https://ubuntu.com/security/CVE-2026-64049 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-64070 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46024 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-64517 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63910 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63841 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-64075 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53025 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63860 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45991 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46137 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-64066 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46223 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-64243 · Vendor Advisory