PT-2026-34954 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-09 · CVE-2026-31602

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 An issue exists in the ALSA ctxfi component where the ct vm map() function always uses Page Table Entries (PTEs) in vm->ptp[0].area regardless of the CT PTP NUM value. On AMD64 systems, a single Page Table Page (PTP) covers 512 PTEs (2M). When aggregate memory allocations exceed this limit, the system attempts to access memory beyond the allocated space, resulting in a page fault.

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

Related Identifiers

CVE-2026-31602

ECHO-CB76-3C98-DF85

OESA-2026-2232

OESA-2026-2234

OESA-2026-2235

OESA-2026-2236

OPENSUSE-SU-2026:10703-1

Affected Products

Linux Kernel

References · 103

• https://ubuntu.com/security/CVE-2026-31602 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31677 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31420 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31602 · Vendor Advisory
• https://git.kernel.org/stable/c/365c36e1a126c6aa1aecedd3a351bcabc66f0c29 · Patch
• https://osv.dev/vulnerability/OESA-2026-2235 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2236 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23442 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31602 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31450 · Security Note
• https://git.kernel.org/stable/c/3fd0685d7fef68c2d8a04876bcf9eaa0724ad6a5 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31602 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31407 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23383 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31423 · Security Note