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Vulnerability record · CVE-2026-43291 · published 8 May 2026

CVE-2026-43291: Linux kernel use of uninitialized resource vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: nfc: nci: Fix parameter validation for packet data Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more. The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

8.3 CVSS 3.1 High EPSS 0.41% · top 67.4% CWE-908 · Use of uninitialized resource
8.3CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: nfc: nci: Fix parameter validation for packet data Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more. The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/3b91160e9a91b5a2662875417dc42dc5b0bf03ea Patch
https://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805 Patch
https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2 Patch
https://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51d Patch
https://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0 Patch
https://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b Patch
https://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43291), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.