PT-2026-27656 · Linux+1 · Linux Kernel+1

Published 2026-01-01 · Updated 2026-05-26 · CVE-2026-23291

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 A flaw exists in the Linux kernel related to Near Field Communication (NFC) functionality using the PN533 driver. Specifically, the driver fails to properly release a reference to the USB interface when a device disconnects, leading to a dangling reference count. This can occur after the driver has finished using the interface.

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

Exploit

Related Identifiers

CVE-2026-23291

ECHO-8AE2-3320-CCCA

OPENSUSE-SU-2026:20826-1

SUSE-SU-2026:21841-1

SUSE-SU-2026:21845-1

SUSE-SU-2026:21860-1

SUSE-SU-2026:21876-1

SUSE-SU-2026:21877-1

SUSE-SU-2026:21916-1

SUSE-SU-2026:21919-1

SUSE-SU-2026:2217-1

SUSE-SU-2026:2238-1

Affected Products

Linux Kernel

Pn533

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23291.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-23291 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23291 · Vendor Advisory
• https://git.kernel.org/stable/c/7ff14eb070f0efecb2606f8d7aa01b77d188e886 · Patch
• https://ubuntu.com/security/CVE-2026-23291 · Vendor Advisory
• https://git.kernel.org/stable/c/5be8aa2bcfb53158436182db8dee9d0b8e5901e6 · Patch
• https://git.kernel.org/stable/c/6645b030b0c1fc5bf338bffb0044238f24b2f770 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23291 · Vendor Advisory
• https://git.kernel.org/stable/c/d1f6d20b3c2642ec85ce6ea5da7155746c31c6d0 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-23291 · Vendor Advisory
• https://git.kernel.org/stable/c/7398d6570501edc55a50ece820f369ab3c1df2e7 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23291 · Vendor Advisory
• https://git.kernel.org/stable/c/00477cab053dc4816b99141d8fcca7a479cfebeb · Patch
• https://git.kernel.org/stable/c/4551d6cea00224ab65a0ef35e4e6da0e9c0a2d74 · Patch
• https://git.kernel.org/stable/c/12133a483dfa832241fbbf09321109a0ea8a520e · Patch