VulnerabilityPublished 18 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ea82b7576793219fa10a8b545f8338998b2a9ce2 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ea82b7576793219fa10a8b545f8338998b2a9ce2, e72cbedc4596e808d22dd2b9fff666ece76f8dd6, b61732f47316d45f27706db7812950145d3327b5 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < ea82b7576793219fa10a8b545f8338998b2a9ce2	Fixed in ea82b7576793219fa10a8b545f8338998b2a9ce2
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < e72cbedc4596e808d22dd2b9fff666ece76f8dd6	Fixed in e72cbedc4596e808d22dd2b9fff666ece76f8dd6
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < b61732f47316d45f27706db7812950145d3327b5	Fixed in b61732f47316d45f27706db7812950145d3327b5
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < 2450a388367231fb7dd798538f393af227c00c4d	Fixed in 2450a388367231fb7dd798538f393af227c00c4d
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < 74b3fbc60907ee97e3af3249091f57351b53a6d6	Fixed in 74b3fbc60907ee97e3af3249091f57351b53a6d6
LinuxLinux	Affected ≥ 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc, < 72b8b2126e854d6756a1aa4bdc66d7457b832294	Fixed in 72b8b2126e854d6756a1aa4bdc66d7457b832294

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The vulnerability is fixed in specific Linux kernel commits identified by the fixedVersions hashes. Users should update their Linux kernel to a version including these fixes to remediate the issue. No additional mitigation is required if the system is updated.

Description

A vulnerability in the Linux kernel NFC driver for the PN533 chip (CVE-2026-98575) allows an out-of-bounds (OOB) read in the function pn533_acr122_is_rx_frame_valid(). This occurs because the driver reads the frame->ccid.datalen field from a USB response frame without proper bounds checking, potentially causing it to read outside the allocated buffer. The issue is fixed by bounding datalen against the maximum ACR122 frame size and rejecting invalid datalen values.

Impact

A malicious or malfunctioning NFC device can cause the Linux kernel driver to read memory outside the intended buffer, potentially leading to information disclosure or kernel instability. There is no indication of known exploitation in the wild. The impact is limited to systems using the affected NFC driver with the PN533 chip.

Summary

The Linux kernel NFC driver for the PN533 chip had a vulnerability where the frame->ccid.datalen field was used unchecked as an index into frame->data[], leading to an out-of-bounds read. This could be triggered by a malicious or malfunctioning device sending crafted USB response frames with arbitrary datalen values. The fix involves bounding datalen against the maximum possible ACR122 frame size and rejecting values less than 2 to prevent underflow and out-of-bounds access.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 10:24 UTC

Technical details

References

Community reviews

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