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CVE-2023-3867

ksmbd: fix out of bounds read in smb2_sess_setup

HIGH
7.1
CVSS Score
Published: August 16, 2025 at 01:29 PM UTC
Updated: August 15, 2026 at 01:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.1
Exploit prediction
EPSS 6%

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out of bounds read in smb2_sess_setup ksmbd does not consider the case of that smb2 session setup is in compound request. If this is the second payload of the compound, OOB read issue occurs while processing the first payload in the smb2_sess_setup().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.15 ≤ v < 5.15.1455.15 ≤ v < 6.1.405.15 ≤ v < 6.4.55.15 ≤ v < 6.55.16 ≤ v < 6.1.406.2 ≤ v < 6.4.55.15e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9
Vendor states this is fixed in 2ba03cecb12ac7ac9e0170e251543c56832d9959 (fixed)
Vendor states this is fixed in 676392184785ace61e939831e7ca44a03d438c3b (fixed)
Vendor states this is fixed in 98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8 (fixed)
Vendor states this is fixed in ef572ffa8eb44111eed2925fbb2adca78bdcbf61 (fixed)
Vendor states this is fixed in 5.15 (unaffected)
Vendor states this is fixed in 5.15.145 (unaffected)
Vendor states this is fixed in 6.1.40 (unaffected)
Vendor states this is fixed in 6.4.5 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2ba03cecb12ac7ac9e0170e251543c56832d9959
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/676392184785ace61e939831e7ca44a03d438c3b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/98422bdd4cb3ca4d08844046f6507d7ec2c2b8d8
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ef572ffa8eb44111eed2925fbb2adca78bdcbf61

CVSS

7.1HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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