CVE-2023-1192

Use-after-free in smb2_is_status_io_timeout()

MEDIUM
6.5
CVSS Score
Published: November 1, 2023 at 07:01 PM UTC
Updated: June 17, 2026 at 05:27 AM UTC
4 products affected across 3 vendorsLinux KernelEnterprise LinuxFedora

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.

Affected

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

v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7 (unaffected)
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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