In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix user-after-free from session log off

There is racy issue between smb2 session log off and smb2 session setup.
It will cause user-after-free from session log off.
This add session_lock when setting SMB2_SESSION_EXPIRED and referece
count to session struct not to free session while it is being used.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00017.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
0626e6641f6b467447c81dd7678a69c66f7746cf affected < 0f62358ce85b2d4c949ef1b648be01b29cec667a
0626e6641f6b467447c81dd7678a69c66f7746cf affected < a9839c37fd813b432988f58a9d9dd59253d3eb2c
0626e6641f6b467447c81dd7678a69c66f7746cf affected < 5511999e9615e4318e9142d23b29bd1597befc08
0626e6641f6b467447c81dd7678a69c66f7746cf affected < ee371898b53a9b9b51c02d22a8c31bfb86d45f0d
0626e6641f6b467447c81dd7678a69c66f7746cf affected < 7aa8804c0b67b3cb263a472d17f2cb50d7f1a930
Linux Linux affected
Version Status Constraints
5.15 affected —
0 unaffected < 5.15
5.15.171 unaffected ≤ 5.15.*
6.1.114 unaffected ≤ 6.1.*
6.6.58 unaffected ≤ 6.6.*
6.11.5 unaffected ≤ 6.11.*
6.12 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4008-1 linux-6.1 security update
EUVD EUVD EUVD-2024-45139 In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix user-after-free from session log off There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add session_lock when setting SMB2_SESSION_EXPIRED and referece count to session struct not to free session while it is being used.
Ubuntu USN Ubuntu USN USN-7276-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7277-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7288-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7288-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7289-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7289-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7289-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7289-4 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7291-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7305-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7308-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7310-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7331-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7383-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7383-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7384-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7384-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7385-1 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7386-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7388-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7389-1 Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN Ubuntu USN USN-7390-1 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7403-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7451-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7458-1 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7468-1 Linux kernel (Azure, N-Series) vulnerabilities
Ubuntu USN Ubuntu USN USN-7523-1 Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7524-1 Linux kernel (Raspberry Pi) vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/0f62358ce85b2d4c949ef1b648be01b29cec667a cve-icon cve-icon
https://git.kernel.org/stable/c/5511999e9615e4318e9142d23b29bd1597befc08 cve-icon cve-icon
https://git.kernel.org/stable/c/7aa8804c0b67b3cb263a472d17f2cb50d7f1a930 cve-icon cve-icon
https://git.kernel.org/stable/c/a9839c37fd813b432988f58a9d9dd59253d3eb2c cve-icon cve-icon
https://git.kernel.org/stable/c/ee371898b53a9b9b51c02d22a8c31bfb86d45f0d cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html cve-icon
https://lore.kernel.org/linux-cve-announce/2024102938-CVE-2024-50086-8134@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2024-50086 cve-icon
https://www.cve.org/CVERecord?id=CVE-2024-50086 cve-icon
History

Mon, 03 Nov 2025 23:30:00 +0000

Type Values Removed Values Added
References

Tue, 15 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.0003}

 epss

{'score': 0.00032}

Fri, 25 Apr 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Fri, 08 Nov 2024 16:15:00 +0000

Type Values Removed Values Added
References

Wed, 30 Oct 2024 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-416
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 30 Oct 2024 02:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Tue, 29 Oct 2024 01:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix user-after-free from session log off There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add session_lock when setting SMB2_SESSION_EXPIRED and referece count to session struct not to free session while it is being used.
Title ksmbd: fix user-after-free from session log off
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-11-03T22:25:18.791Z

Reserved: 2024-10-21T19:36:19.942Z

Link: CVE-2024-50086

cve-icon Vulnrichment

Updated: 2025-11-03T22:25:18.791Z

cve-icon NVD

Status : Modified

Published: 2024-10-29T01:15:05.487

Modified: 2025-11-03T23:16:48.810

Link: CVE-2024-50086

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-10-29T00:00:00Z

Links: CVE-2024-50086 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses