CVE-2022-48697

Invalid kernel-memory read via premature namespace release

Published May 3, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel NVMe target allows local users to trigger an invalid kernel-memory read during loopback I/O completion. The __nvmet_req_complete function released the namespace before queue_response handled the completed request, allowing the response path to use namespace-backed request state after release. The demonstrated trigger requires a locally configured NVMe loop target and the blktests nvme/004 workload; published evidence establishes neither a remote path nor code execution.

CVSS severity5.3
Medium
EPSS probability0.59%
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 NVMe target allows local users to trigger an invalid kernel-memory read during loopback I/O completion. The __nvmet_req_complete function released the namespace before queue_response handled the completed request, allowing the response path to use namespace-backed request state after release. The demonstrated trigger requires a locally configured NVMe loop target and the blktests nvme/004 workload; published evidence establishes neither a remote path nor code execution.

The record

CVE
CVE-2022-48697
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.8
  2. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <17f121ca3ec6be0fb32d77c7f65362934a38cc8e
  3. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <4484ce97a78171668c402e0c45db7f760aea8060
  4. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <6a02a61e81c231cc5c680c5dbf8665275147ac52
  5. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <8d66989b5f7bb28bba2f8e1e2ffc8bfef4a10717
  6. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <be01f1c988757b95f11f090a9f491365670a522b
  7. Affected versionversion=a07b4970f464f13640e28e16dad6cfa33647cc99 <ebf46da50beb78066674354ad650606a467e33fa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <17f121ca3ec6be0fb32d77c7f65362934a38cc8e; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <4484ce97a78171668c402e0c45db7f760aea8060; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <6a02a61e81c231cc5c680c5dbf8665275147ac52; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <8d66989b5f7bb28bba2f8e1e2ffc8bfef4a10717; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <be01f1c988757b95f11f090a9f491365670a522b; version=a07b4970f464f13640e28e16dad6cfa33647cc99 <ebf46da50beb78066674354ad650606a467e33fa

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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 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

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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