PT-2026-36328 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-06-05 · CVE-2026-31698

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description An issue exists in the crypto CCP module when retrieving the PDH certificate. If a firmware command fails, specifically due to an invalid length where the userspace buffer is too small, the system may still attempt to copy blobs to userspace. This can lead to a slab-out-of-bounds read, overflowing the kernel-allocated buffer and leaking sensitive data to userspace. The issue involves the sev ioctl do pdh export() and sev ioctl() functions.

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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-31698

ECHO-64E0-539D-2FF6

OESA-2026-2311

OESA-2026-2415

OESA-2026-2581

OPENSUSE-SU-2026:10793-1

Affected Products

Linux Kernel

References · 183

• https://nvd.nist.gov/vuln/detail/CVE-2025-23145 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31398 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-71239 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31628 · Security Note
• https://git.kernel.org/stable/c/78b97e43d0b3e674d9d49ae56937b11e2ba3fcaf · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31429 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31771 · Security Note
• https://git.kernel.org/stable/c/051e51aa55fd4cdc3e8283cf4476aeeb5f563274 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23244 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31773 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31527 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43036 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43284 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31698 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31698 · Vendor Advisory