CVE-2022-48867

Kernel oops via freed completion descriptor access

Published Aug 21, 2024 · Updated May 11, 2026

Use-after-free in the IDXD DMA driver in Linux 5.19 through 6.1.7 allows local users to trigger a kernel oops during driver unload. The unload path frees pending descriptors in idxd_wq_free_resources before idxd_flush_pending_descs can read them or the device can write completions. Reachability requires an IDXD work queue with pending descriptors during driver unload; panic-on-oops settings determine whether the host reboots.

CVSS severity7.8
High
EPSS probability0.23%
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 IDXD DMA driver in Linux 5.19 through 6.1.7 allows local users to trigger a kernel oops during driver unload. The unload path frees pending descriptors in idxd_wq_free_resources before idxd_flush_pending_descs can read them or the device can write completions. Reachability requires an IDXD work queue with pending descriptors during driver unload; panic-on-oops settings determine whether the host reboots.

The record

CVE
CVE-2022-48867
Published
Aug 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.19
  2. Affected versionversion=63c14ae6c161dec8ff3be49277edc75a769e054a <1beeec45f9ac31eba52478379f70a5fa9c2ad005
  3. Affected versionversion=63c14ae6c161dec8ff3be49277edc75a769e054a <b9e8e3fcfec625fc1c2f68f684448aeeb882625b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=63c14ae6c161dec8ff3be49277edc75a769e054a <1beeec45f9ac31eba52478379f70a5fa9c2ad005; version=63c14ae6c161dec8ff3be49277edc75a769e054a <b9e8e3fcfec625fc1c2f68f684448aeeb882625b

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

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

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

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-416Use After Free
T1499.004Application or System Exploitation

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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