CVE-2022-48686Network attack vector

Kernel crash via post-digest-error socket read

Published May 3, 2024 · Updated Aug 5, 2026

Use-after-free in the nvme-tcp host driver in affected Linux 5.0 and later allows attackers to crash the kernel via a digest error. The nvme_tcp_io_work loop continues reading from an out-of-sync socket after digest handling enables deferred reads, reusing state released by the error path. Reachability requires an active NVMe/TCP host connection with digest checking and a peer able to supply a bad digest; the bounded consequence is a host service interruption.

CVSS severity9.8
Critical
EPSS probability0.70%
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 nvme-tcp host driver in affected Linux 5.0 and later allows attackers to crash the kernel via a digest error. The nvme_tcp_io_work loop continues reading from an out-of-sync socket after digest handling enables deferred reads, reusing state released by the error path. Reachability requires an active NVMe/TCP host connection with digest checking and a peer able to supply a bad digest; the bounded consequence is a host service interruption.

The record

CVE
CVE-2022-48686
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
network
Privileges
unauthenticated

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

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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=3f2304f8c6d6ed97849057bd16fee99e434ca796 <13c80a6c112467bab5e44d090767930555fc17a5
  2. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <160f3549a907a50e51a8518678ba2dcf2541abea
  3. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <19816a0214684f70b49b25075ff8c402fdd611d3
  4. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <5914fa32ef1b7766fea933f9eed94ac5c00aa7ff
  5. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <c3eb461aa56e6fa94fb80442ba2586bd223a8886
  6. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <13c80a6c112467bab5e44d090767930555fc17a5; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <160f3549a907a50e51a8518678ba2dcf2541abea; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <19816a0214684f70b49b25075ff8c402fdd611d3; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <5914fa32ef1b7766fea933f9eed94ac5c00aa7ff; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <c3eb461aa56e6fa94fb80442ba2586bd223a8886; version=5.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

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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