CVE-2023-53245

Kernel panic via storvsc NULL dereference

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in the Linux kernel storvsc driver allows local users to trigger a kernel panic during virtual Fibre Channel I/O timeouts. The storvsc_eh_timed_out() handler passes the timeout to fc_eh_timed_out(), which looks up a nonexistent rport and dereferences the resulting NULL pointer. The flaw is reachable in a Hyper-V guest using storvsc-backed virtual Fibre Channel storage when an I/O request times out, and its bounded consequence is a guest kernel panic.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel storvsc driver allows local users to trigger a kernel panic during virtual Fibre Channel I/O timeouts. The storvsc_eh_timed_out() handler passes the timeout to fc_eh_timed_out(), which looks up a nonexistent rport and dereferences the resulting NULL pointer. The flaw is reachable in a Hyper-V guest using storvsc-backed virtual Fibre Channel storage when an I/O request times out, and its bounded consequence is a guest kernel panic.

The record

CVE
CVE-2023-53245
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <048ebc9a28fb918ee635dd4b2fcf4248eb6e4050
  2. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <1678408d08f31a694d5150a56796dd04c9710b22
  3. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <175544ad48cbf56affeef2a679c6a4d4fb1e2881
  4. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <311db605e07f0d4fc0cc7ddb74f1e5692ea2f469
  5. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <763c06565055ae373fe7f89c11e1447bd1ded264
  6. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <7a792b3d888aab2c65389f9f4f9f2f6c000b1a0d
  7. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <cd87f4df9865a53807001ed12c0f0420b14ececd
  8. Affected versionversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <ed70fa5629a8b992a5372d7044d1db1f8fa6de29
  9. Affected versionversion=4.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <048ebc9a28fb918ee635dd4b2fcf4248eb6e4050; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <1678408d08f31a694d5150a56796dd04c9710b22; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <175544ad48cbf56affeef2a679c6a4d4fb1e2881; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <311db605e07f0d4fc0cc7ddb74f1e5692ea2f469; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <763c06565055ae373fe7f89c11e1447bd1ded264; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <7a792b3d888aab2c65389f9f4f9f2f6c000b1a0d; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <cd87f4df9865a53807001ed12c0f0420b14ececd; version=3930d7309807ba0bfa460dfa9ed68d5560347dd2 <ed70fa5629a8b992a5372d7044d1db1f8fa6de29; version=4.13

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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