CVE-2022-48673

Host crash via premature SMC link freeing

Published May 3, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel SMC link-clear path allows attackers to crash the host through a link-teardown race. The path changes the queue pair to Error, then destroys it and frees the link group before flushed receive work requests finish, leaving the receive tasklet to access released memory. Reachability requires an active SMC-over-RDMA link and concurrent teardown; the demonstrated consequence is a kernel page fault and host service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.50%
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 SMC link-clear path allows attackers to crash the host through a link-teardown race. The path changes the queue pair to Error, then destroys it and frees the link group before flushed receive work requests finish, leaving the receive tasklet to access released memory. Reachability requires an active SMC-over-RDMA link and concurrent teardown; the demonstrated consequence is a kernel page fault and host service interruption.

The record

CVE
CVE-2022-48673
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

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=4.11
  2. Affected versionversion=bd4ad57718cc86d2972a20f9791cd079996a4dd6 <89fcb70f1acd6b0bbf2f7bfbf45d7aa75a9bdcde
  3. Affected versionversion=bd4ad57718cc86d2972a20f9791cd079996a4dd6 <e9b1a4f867ae9c1dbd1d71cd09cbdb3239fb4968

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=bd4ad57718cc86d2972a20f9791cd079996a4dd6 <89fcb70f1acd6b0bbf2f7bfbf45d7aa75a9bdcde; version=bd4ad57718cc86d2972a20f9791cd079996a4dd6 <e9b1a4f867ae9c1dbd1d71cd09cbdb3239fb4968

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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