CVE-2024-26615

Local kernel crash via uninitialized SMC-D descriptor

Published Feb 29, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash the kernel by dumping active SMC-D connections. The SMC diagnostic dump path reads conn->rmb_desc after smc_conn_create() registers a connection but before smc_buf_create() initializes that descriptor. The race requires local low-privileged access, active SMC-D connection establishment, and concurrent diagnostic dumping; impact is limited to a system crash.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows local users to crash the kernel by dumping active SMC-D connections. The SMC diagnostic dump path reads conn->rmb_desc after smc_conn_create() registers a connection but before smc_buf_create() initializes that descriptor. The race requires local low-privileged access, active SMC-D connection establishment, and concurrent diagnostic dumping; impact is limited to a system crash.

The record

CVE
CVE-2024-26615
Published
Feb 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 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=4.19
  2. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <1fea9969b81c67d0cb1611d1b8b7d19049d937be
  3. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <27aea64838914c6122db5b8bd4bed865c9736f22
  4. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d
  5. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <68b888d51ac82f2b96bf5e077a31d76afcdef25a
  6. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <6994dba06321e3c48fdad0ba796a063d9d82183a
  7. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <8f3f9186e5bb96a9c9654c41653210e3ea7e48a6
  8. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <a164c2922675d7051805cdaf2b07daffe44f20d9
  9. Affected versionversion=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <dbc153fd3c142909e564bb256da087e13fbf239c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <1fea9969b81c67d0cb1611d1b8b7d19049d937be; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <27aea64838914c6122db5b8bd4bed865c9736f22; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <68b888d51ac82f2b96bf5e077a31d76afcdef25a; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <6994dba06321e3c48fdad0ba796a063d9d82183a; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <8f3f9186e5bb96a9c9654c41653210e3ea7e48a6; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <a164c2922675d7051805cdaf2b07daffe44f20d9; version=4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d <dbc153fd3c142909e564bb256da087e13fbf239c

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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