CVE-2022-50475

Kernel crash via invalid RDMA port pointer

Published Oct 4, 2025 · Updated Oct 4, 2025

NULL pointer dereference in the Linux kernel's RDMA core allows local users to crash the system by reading an affected sysfs node. The RDMA sysfs lifecycle publishes the kobject before setting ib_port and can leave the pointer available after removal, so attribute handlers dereference NULL. The crash requires local low-privileged access to an RDMA port attribute while its sysfs object is being added or removed.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel's RDMA core allows local users to crash the system by reading an affected sysfs node. The RDMA sysfs lifecycle publishes the kobject before setting ib_port and can leave the pointer available after removal, so attribute handlers dereference NULL. The crash requires local low-privileged access to an RDMA port attribute while its sysfs object is being added or removed.

The record

CVE
CVE-2022-50475
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=5.14
  2. Affected versionversion=d8a5883814b9f7c08d7ff291070687d925b4f859 <5e15ff29b156bbbdeadae230c8ecd5ecd8ca2477
  3. Affected versionversion=d8a5883814b9f7c08d7ff291070687d925b4f859 <ac7a7d7079124f46180714b2d41a1703d37101bb
  4. Affected versionversion=d8a5883814b9f7c08d7ff291070687d925b4f859 <cd06d32a71fbb198b2d43dddf794badd80ffd25d
  5. Affected versionversion=d8a5883814b9f7c08d7ff291070687d925b4f859 <f981c697b2f9bd5dd2f060e47ff8b5e0a2cd0c06

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=d8a5883814b9f7c08d7ff291070687d925b4f859 <5e15ff29b156bbbdeadae230c8ecd5ecd8ca2477; version=d8a5883814b9f7c08d7ff291070687d925b4f859 <ac7a7d7079124f46180714b2d41a1703d37101bb; version=d8a5883814b9f7c08d7ff291070687d925b4f859 <cd06d32a71fbb198b2d43dddf794badd80ffd25d; version=d8a5883814b9f7c08d7ff291070687d925b4f859 <f981c697b2f9bd5dd2f060e47ff8b5e0a2cd0c06

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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