CVE-2022-50245

Kernel memory corruption via stale RapidIO file entry

Published Sep 15, 2025 · Updated Sep 15, 2025

Use-after-free in the Linux kernel RapidIO mport driver from 4.6 allows local users to corrupt kernel memory after an allocation failure. In mport_cdev_open, the kfifo_alloc failure path frees the per-file priv object without removing its list node from chdev->file_list, so later traversal accesses freed memory. Reachability requires an available RapidIO mport character device and a FIFO allocation failure; the resulting corruption occurs in privileged kernel state.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel RapidIO mport driver from 4.6 allows local users to corrupt kernel memory after an allocation failure. In mport_cdev_open, the kfifo_alloc failure path frees the per-file priv object without removing its list node from chdev->file_list, so later traversal accesses freed memory. Reachability requires an available RapidIO mport character device and a FIFO allocation failure; the resulting corruption occurs in privileged kernel state.

The record

CVE
CVE-2022-50245
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=4.6
  2. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <02d7d89f816951e0862147d751b1150d67aaebdd
  3. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <2a6c75adf8192f07ddcdd4a1a13488c890a73919
  4. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <2ba06e57f933f0eac242e8b389433da1cc00d4d5
  5. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <2dfd60724d271a6ab99f93f40f38f2ced1ddbb87
  6. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <2f5cc7fd73fd6253cc71214f0dd499cc62feb469
  7. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <311b488405ac45af46756b1c8f1d27007b68b07e
  8. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <5ee850645e42f541ce1ea8130c2b27cc495f965c
  9. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <a253dde0403a153075ffb254f6f7b2635e49e97a
  10. Affected versionversion=e8de370188d098bb49483c287b44925957c3c9b6 <cb87af2c19c0993f6e21f75b963a5599c5a73e76

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=e8de370188d098bb49483c287b44925957c3c9b6 <02d7d89f816951e0862147d751b1150d67aaebdd; version=e8de370188d098bb49483c287b44925957c3c9b6 <2a6c75adf8192f07ddcdd4a1a13488c890a73919; version=e8de370188d098bb49483c287b44925957c3c9b6 <2ba06e57f933f0eac242e8b389433da1cc00d4d5; version=e8de370188d098bb49483c287b44925957c3c9b6 <2dfd60724d271a6ab99f93f40f38f2ced1ddbb87; version=e8de370188d098bb49483c287b44925957c3c9b6 <2f5cc7fd73fd6253cc71214f0dd499cc62feb469; version=e8de370188d098bb49483c287b44925957c3c9b6 <311b488405ac45af46756b1c8f1d27007b68b07e; version=e8de370188d098bb49483c287b44925957c3c9b6 <5ee850645e42f541ce1ea8130c2b27cc495f965c; version=e8de370188d098bb49483c287b44925957c3c9b6 <a253dde0403a153075ffb254f6f7b2635e49e97a; version=e8de370188d098bb49483c287b44925957c3c9b6 <cb87af2c19c0993f6e21f75b963a5599c5a73e76

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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