PT-2026-36411 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-31776

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 In the ALSA ctxfi component, the daio device index() function fails to properly handle the SPDIF1 DAIO type for hw20k2. This causes the function to return -EINVAL, leading to an out-of-bounds array access.

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

Improper Validation of Array Index

Weakness Enumeration

CWE-129

Related Identifiers

CVE-2026-31776

ECHO-C7D3-9907-5FB9

Affected Products

Linux Kernel

References · 15

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31776 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31776 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31776 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31776 · Security Note
• https://git.kernel.org/stable/c/950decf59d4e978b60a792ce0b3e1555a608f489 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31776 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31776 · Vendor Advisory
• https://git.kernel.org/stable/c/b045ab3dff97edae6d538eeff900a34c098761f8 · Patch
• https://git.kernel.org/linus/b045ab3dff97edae6d538eeff900a34c098761f8 · Note
• https://git.kernel.org/stable/c/a0b45bdfffce9894b39392d061c14fda24de8b67 · Note
• https://git.kernel.org/stable/c/c8859675f1cf92fe2eb25ef525440702140a0b55 · Note
• https://git.kernel.org/stable/c/28222e13666b5d26bf66563c056069ed32f87b33 · Note
• https://git.kernel.org/stable/c/57698f184e1afbe054b3cd30e2c43a67c11d7f5e · Note
• https://git.kernel.org/stable/c/5b39985303a639b159dea306a032c08ef22f029d · Note
• https://git.kernel.org/stable/c/a3b0e5f84058a9c3d0542a71c2b3a7801e4ee26a · Note