CVE-2026-90222

Invalid memory access via request-buffer completion race

Published Sep 17, 2026 · Updated Sep 17, 2026

Use-after-free in the Linux PN533 NFC driver allows local users to trigger invalid kernel memory access via an I2C completion race. After __pn533_send_async() publishes a command, completion frees its request buffer while pn533_i2c_send_frame() still dereferences it without holding a temporary reference. Reachability requires an active PN533 I2C transport and overlapping completion; the upstream disclosure establishes neither a specific crash outcome nor privilege escalation.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux PN533 NFC driver allows local users to trigger invalid kernel memory access via an I2C completion race. After __pn533_send_async() publishes a command, completion frees its request buffer while pn533_i2c_send_frame() still dereferences it without holding a temporary reference. Reachability requires an active PN533 I2C transport and overlapping completion; the upstream disclosure establishes neither a specific crash outcome nor privilege escalation.

The record

CVE
CVE-2026-90222
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.7
  2. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <19f1239758c23f087f4c25733cfcf62bf0b06051
  3. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <3e7a093c177f9f8b9fd039cab41191515079425a
  4. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <47792358a624ea066455ef86b744159928cd7716
  5. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <753bdaf3220fe8371a6c3c75da645ea7753d11be
  6. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <7a8e0a7aef80721da287ac246349aba7d98f6aed
  7. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <7ee72c64b4b66b1b42dbddbca0a80a218f1b9297
  8. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8710faddef4ad8b2a6bfa985d896e2e1bfb77018
  9. Affected versionversion=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <d329f61ad5786900334a54c2445dc99feda545bf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.7; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <19f1239758c23f087f4c25733cfcf62bf0b06051; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <3e7a093c177f9f8b9fd039cab41191515079425a; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <47792358a624ea066455ef86b744159928cd7716; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <753bdaf3220fe8371a6c3c75da645ea7753d11be; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <7a8e0a7aef80721da287ac246349aba7d98f6aed; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <7ee72c64b4b66b1b42dbddbca0a80a218f1b9297; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <8710faddef4ad8b2a6bfa985d896e2e1bfb77018; version=9815c7cf22daceabfb919ddcd6f2c80e049c1fbc <d329f61ad5786900334a54c2445dc99feda545bf

Published CVSS scores

5.3SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
5.3Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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