CVE-2023-53615

Debug-kernel crash via duplicate session deletion

Published Oct 4, 2025 · Updated Oct 4, 2025

A race condition in the qla2xxx SCSI driver in Linux 4.11 through 6.5.3 allows local users to crash a debug kernel. The driver updates an FC port's deleted flag outside the session lock, allowing two CPUs to enqueue the same session deletion and corrupt the deletion list. Reachability requires the qla2xxx driver, a debug kernel, and concurrent Fibre Channel session deletion; the reported consequence is a system crash.

CVSS severity4.7
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in the qla2xxx SCSI driver in Linux 4.11 through 6.5.3 allows local users to crash a debug kernel. The driver updates an FC port's deleted flag outside the session lock, allowing two CPUs to enqueue the same session deletion and corrupt the deletion list. Reachability requires the qla2xxx driver, a debug kernel, and concurrent Fibre Channel session deletion; the reported consequence is a system crash.

The record

CVE
CVE-2023-53615
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=4.11
  2. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <4d7da12483e98c451a51bd294a3d3494f0aee5eb
  3. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <6dfe4344c168c6ca20fe7640649aacfcefcccb26
  4. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <a4628a5b98e4c6d905e1f7638242612d7db7d9c2
  5. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <b05017cb4ff75eea783583f3d400059507510ab1
  6. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <cd06c45b326e44f0d21dc1b3fa23e71f46847e28
  7. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <f1ea164be545629bf442c22f508ad9e7b94ac100

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=726b85487067d7f5b23495bc33c484b8517c4074 <4d7da12483e98c451a51bd294a3d3494f0aee5eb; version=726b85487067d7f5b23495bc33c484b8517c4074 <6dfe4344c168c6ca20fe7640649aacfcefcccb26; version=726b85487067d7f5b23495bc33c484b8517c4074 <a4628a5b98e4c6d905e1f7638242612d7db7d9c2; version=726b85487067d7f5b23495bc33c484b8517c4074 <b05017cb4ff75eea783583f3d400059507510ab1; version=726b85487067d7f5b23495bc33c484b8517c4074 <cd06c45b326e44f0d21dc1b3fa23e71f46847e28; version=726b85487067d7f5b23495bc33c484b8517c4074 <f1ea164be545629bf442c22f508ad9e7b94ac100

Published CVSS scores

4.7Canonical UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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.

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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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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