CVE-2023-53597

MEDIUM EPSS 3.2%
Published Oct 4, 20258mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 4, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix mid leak during reconnection after timeout threshold When the number of responses with status of STATUS_IO_TIMEOUT exceeds a specified threshold (NUM_STATUS_IO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests. This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids. This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused. Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too. Also renamed NUM_STATUS_IO_TIMEOUT to a more appropriate name MAX_STATUS_IO_TIMEOUT.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.9.5  –  <5.15.150
linuxlinux_kernel*≥5.16  –  <6.1.42
linuxlinux_kernel*≥6.2  –  <6.4.7
linuxlinux_kernel6.5any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/57d25e9905c71133e201f6d06b56a3403d4ad433
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/69cba9d3c1284e0838ae408830a02c4a063104bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c55901d381a22300c9922170e59704059f50977b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df31d05f0678cdd0796ea19983a2b93edca18bb0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/57d25e9905c71133e201f6d06b56a3403d4ad433
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/69cba9d3c1284e0838ae408830a02c4a063104bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c55901d381a22300c9922170e59704059f50977b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df31d05f0678cdd0796ea19983a2b93edca18bb0
    Patch