CVE-2024-46742Network attack vector

Kernel crash via unchecked SMB2 lease context

Published Sep 18, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux ksmbd SMB server allows attackers to crash the kernel through a malformed SMB2 lease request. In smb2_open(), parse_lease_state() can return NULL for a lease request, yet the code dereferences the resulting lease_ctx_info without checking it. The ksmbd server must be enabled and processing SMB2 lease-capable open requests; the documented consequence is a kernel crash, with no reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.24%
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 ksmbd SMB server allows attackers to crash the kernel through a malformed SMB2 lease request. In smb2_open(), parse_lease_state() can return NULL for a lease request, yet the code dereferences the resulting lease_ctx_info without checking it. The ksmbd server must be enabled and processing SMB2 lease-capable open requests; the documented consequence is a kernel crash, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2024-46742
Published
Sep 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 18, 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=0626e6641f6b467447c81dd7678a69c66f7746cf <07f384c5be1f8633b13f0a22616e227570450bc6
  2. Affected versionversion=0626e6641f6b467447c81dd7678a69c66f7746cf <3b692794b81f2ecad69a4adbba687f3836824ada
  3. Affected versionversion=0626e6641f6b467447c81dd7678a69c66f7746cf <4e8771a3666c8f216eefd6bd2fd50121c6c437db
  4. Affected versionversion=0626e6641f6b467447c81dd7678a69c66f7746cf <878f32878351104448b86ef5b85d1f8ed6f599fb
  5. Affected versionversion=0626e6641f6b467447c81dd7678a69c66f7746cf <ec28c35029b7930f31117f9284874b63bea4f31b
  6. Affected versionversion=5.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0626e6641f6b467447c81dd7678a69c66f7746cf <07f384c5be1f8633b13f0a22616e227570450bc6; version=0626e6641f6b467447c81dd7678a69c66f7746cf <3b692794b81f2ecad69a4adbba687f3836824ada; version=0626e6641f6b467447c81dd7678a69c66f7746cf <4e8771a3666c8f216eefd6bd2fd50121c6c437db; version=0626e6641f6b467447c81dd7678a69c66f7746cf <878f32878351104448b86ef5b85d1f8ed6f599fb; version=0626e6641f6b467447c81dd7678a69c66f7746cf <ec28c35029b7930f31117f9284874b63bea4f31b; version=5.15

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)
Vectornetwork
PrivilegesUnavailable
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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