Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid() frame->ccid.datalen is read directly from the USB response frame and used, unchecked, as an index into frame->data[]. A malicious or malfunctioning device can set this field to an arbitrary value, causing the driver to read far outside the received buffer. Bound ccid.datalen against the maximum possible ACR122 frame size before using it. This replaces the existing datalen == 0 check, since datalen < 2 already covers that case and additionally rejects datalen == 1, which would still underflow the "datalen - 2" offset used below.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4019

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98866CVE-2026-98624CVE-2026-98745+326 more CVEs

[ References ]References

• git.kernel.org/stable/c/2450a388367231fb7dd798538f393af227c00c4d
• git.kernel.org/stable/c/72b8b2126e854d6756a1aa4bdc66d7457b832294
• git.kernel.org/stable/c/74b3fbc60907ee97e3af3249091f57351b53a6d6
• git.kernel.org/stable/c/8a0f1bb790d964893db7fc59febda9a534db07b3
• git.kernel.org/stable/c/8db3b1e012a8b25078dfa1efabe3d0cd2916dcba
• git.kernel.org/stable/c/b61732f47316d45f27706db7812950145d3327b5
• git.kernel.org/stable/c/e72cbedc4596e808d22dd2b9fff666ece76f8dd6
• git.kernel.org/stable/c/ea82b7576793219fa10a8b545f8338998b2a9ce2