CVE-2024-35866

Local system crash via stale SMB session reference

Published May 19, 2024 · Updated May 11, 2026

Use-after-free in the Linux SMB client allows local users to crash the system while a matching SMB session is being torn down. The cifs_dump_full_key function traverses SMB sessions and retains a matching session without locking its state or rejecting SES_EXITING. Exploitation requires local access, an active SMB client session, and a race between a full-key dump request and session teardown.

CVSS severity7.8
High
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

Use-after-free in the Linux SMB client allows local users to crash the system while a matching SMB session is being torn down. The cifs_dump_full_key function traverses SMB sessions and retains a matching session without locking its state or rejecting SES_EXITING. Exploitation requires local access, an active SMB client session, and a race between a full-key dump request and session teardown.

The record

CVE
CVE-2024-35866
Published
May 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 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=1bb56810677f26b78d57a3038054943efd334a1c <10e17ca4000ec34737bde002a13435c38ace2682
  2. Affected versionversion=1bb56810677f26b78d57a3038054943efd334a1c <3103163ccd3be4adcfa37e15608fb497be044113
  3. Affected versionversion=1bb56810677f26b78d57a3038054943efd334a1c <58acd1f497162e7d282077f816faa519487be045
  4. Affected versionversion=1bb56810677f26b78d57a3038054943efd334a1c <d798fd98e3563027c5162259ead517057d6fa794
  5. Affected versionversion=1bb56810677f26b78d57a3038054943efd334a1c <f4a60d360d9114b5085701a3702a0102b0d6d846
  6. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1bb56810677f26b78d57a3038054943efd334a1c <10e17ca4000ec34737bde002a13435c38ace2682; version=1bb56810677f26b78d57a3038054943efd334a1c <3103163ccd3be4adcfa37e15608fb497be044113; version=1bb56810677f26b78d57a3038054943efd334a1c <58acd1f497162e7d282077f816faa519487be045; version=1bb56810677f26b78d57a3038054943efd334a1c <d798fd98e3563027c5162259ead517057d6fa794; version=1bb56810677f26b78d57a3038054943efd334a1c <f4a60d360d9114b5085701a3702a0102b0d6d846; version=5.13

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

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

CWE-416Use After Free
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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