PT-2026-38933 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-26 · CVE-2026-43291

Positive Technologies (AI Summary)

CVSS v3.1

8.3

High

Base vector

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

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

Description An issue exists in the net: nfc: nci component where parameter validation for packet data was incorrectly implemented. A previous attempt to prevent access to uninitialized data failed to account for variable-length data packets, which cannot be compared against a maximum packet length defined by the sizeof(struct). This resulted in a failure of communication with NCI NFC chips.

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

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2026-43291

Affected Products

Linux Kernel

References · 21

• https://ubuntu.com/security/CVE-2026-43291 · Vendor Advisory
• https://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805 · Patch
• https://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43291 · Security Note
• https://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51d · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43291 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43291 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43291 · Vendor Advisory
• https://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5 · Patch
• https://git.kernel.org/stable/c/3b91160e9a91b5a2662875417dc42dc5b0bf03ea · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43291 · Vendor Advisory
• https://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43291 · Security Note
• https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-43291 · Vendor Advisory