PT-2026-36384 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-06 · CVE-2026-31749

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 An issue exists in the comedi ni atmio16d driver where the atmio16d detach() handler function calls reset atmio16d() unconditionally during a failed attach process. If the atmio16d attach() function returns an error before the device is fully initialized, dev->iobase may remain 0, leading to undesired writes to low I/O port addresses. Additionally, dev->private may be NULL, resulting in null pointer dereferences (an attempt to access a memory location that does not exist).

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-31749

ECHO-6507-FE38-A90E

Affected Products

Linux Kernel

References · 17

• https://git.kernel.org/stable/c/5d8d88c8c0eec230de8f1f60e0920a4337939a88 · Patch
• https://git.kernel.org/stable/c/101ab946b79ad83b36d5cfd47de587492a80acf0 · Patch
• https://git.kernel.org/stable/c/3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3 · Patch
• https://git.kernel.org/stable/c/43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2 · Patch
• https://git.kernel.org/stable/c/d07d97ca4f7fac467cdcf4a012690853958b7e89 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31749 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31749 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31749 · Security Note
• https://git.kernel.org/stable/c/933a2d6a95f9bfb203e562c9be1dd990c735535c · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31749 · Vendor Advisory
• https://git.kernel.org/stable/c/f517646e008fe99ca1800601cd011b110f8684ae · Patch
• https://cve.org/CVERecord?id=CVE-2026-31749 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31749 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31749 · Vendor Advisory
• https://git.kernel.org/stable/c/a01dd339ea6ac58b0967a50085622a6017351140 · Patch