What’s Vulnerable › Vulnerabilities

CVE-2026-98575: nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 4.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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