CVE-2022-50656

Kernel-memory disclosure and crash via uncleared target

Published Dec 9, 2025 · Updated Aug 5, 2026

Out-of-bounds read in the Linux kernel PN533 NFC driver allows physically proximate attackers to disclose kernel memory via NFC. pn533 duplicates an incompletely initialized nfc_target, so garbage length fields make nla_put() copy beyond the 76-byte target into a netlink reply. A PN533 reader must be polling for NFC-DEP and accept an in-range peer; dumping the poisoned target can expose adjacent heap data or crash the kernel.

CVSS severity8.1
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel PN533 NFC driver allows physically proximate attackers to disclose kernel memory via NFC. pn533 duplicates an incompletely initialized nfc_target, so garbage length fields make nla_put() copy beyond the 76-byte target into a netlink reply. A PN533 reader must be polling for NFC-DEP and accept an in-range peer; dumping the poisoned target can expose adjacent heap data or crash the kernel.

The record

CVE
CVE-2022-50656
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=3.3
  2. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <61a7e15d55fae329a245535c3bac494e401005b8
  3. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <755019e37815a66bb0a23893debbd3dd640ccbd3
  4. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03
  5. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <9da4a0411f3455e3885831d0758bee3e3d565bbc
  6. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <9f28157778ede0d4f183f7ab3b46995bb400abbe
  7. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6
  8. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <aea9e64dec2cc6cd742e07ecd4e6236fc76b389b
  9. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <bef2f478513e7367ef3b05441f6afca981de29be
  10. Affected versionversion=361f3cb7f9cfdb82c80926d0e7843c098c034545 <e491285b4d08884b622638be8e4961eb43b0af64

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <61a7e15d55fae329a245535c3bac494e401005b8; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <755019e37815a66bb0a23893debbd3dd640ccbd3; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <9da4a0411f3455e3885831d0758bee3e3d565bbc; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <9f28157778ede0d4f183f7ab3b46995bb400abbe; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <aea9e64dec2cc6cd742e07ecd4e6236fc76b389b; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <bef2f478513e7367ef3b05441f6afca981de29be; version=361f3cb7f9cfdb82c80926d0e7843c098c034545 <e491285b4d08884b622638be8e4961eb43b0af64

Published CVSS scores

8.1LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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