Vulnerability in Linux

CVE-2026-43291

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).

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-43291: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

  • Linux — versions 6.1.165, 74837bca0748763a77f77db47a0bdbe63b347628, 9c328f54741bd5465ca1dc717c84c04242fac2e1
  • Linux Kernel

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-43291?
CVE-2026-43291 is a high-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 8.3/10. Published 2026-05-08.
How severe is CVE-2026-43291?
High severity. CVSS v3 base score is 8.3 out of 10.