CVE-2022-50493

Host crash via abort-timeout double completion

Published Oct 4, 2025 · Updated Oct 4, 2025

Denial of service in the Linux qla2xxx SCSI driver allows attackers on an attached Fibre Channel SAN to crash the host kernel. The qla24xx_abort_iocb_timeout path completes an aborting request without first verifying that both the original I/O and its abort request remain outstanding, permitting double completion of a freed request. Reachability requires qla2xxx-backed NVMe over Fibre Channel I/O and an attached SAN target that controls completion timing; the demonstrated consequence is a host-kernel crash.

CVSS severity8.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux qla2xxx SCSI driver allows attackers on an attached Fibre Channel SAN to crash the host kernel. The qla24xx_abort_iocb_timeout path completes an aborting request without first verifying that both the original I/O and its abort request remain outstanding, permitting double completion of a freed request. Reachability requires qla2xxx-backed NVMe over Fibre Channel I/O and an attached SAN target that controls completion timing; the demonstrated consequence is a host-kernel crash.

The record

CVE
CVE-2022-50493
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

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=457173c8b43ecd3ac48c8ace8d4437a50f7ad77b
  2. Affected versionversion=5.5
  3. Affected versionversion=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <05382ed9142cf8a8a3fb662224477eecc415778b
  4. Affected versionversion=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <68ad83188d782b2ecef2e41ac245d27e0710fe8e
  5. Affected versionversion=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <cb4dff498468b62e8c520568559b3a9007e104d7
  6. Affected versionversion=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <d3871af13aa03fbbe7fbb812eaf140501229a72e
  7. Affected versionversion=b7abcc7df5e131c0b4bf89cb2411c5301ee83d26

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=457173c8b43ecd3ac48c8ace8d4437a50f7ad77b; version=5.5; version=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <05382ed9142cf8a8a3fb662224477eecc415778b; version=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <68ad83188d782b2ecef2e41ac245d27e0710fe8e; version=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <cb4dff498468b62e8c520568559b3a9007e104d7; version=71c80b75ce8f08c0978ce9a9816b81b5c3ce5e12 <d3871af13aa03fbbe7fbb812eaf140501229a72e; version=b7abcc7df5e131c0b4bf89cb2411c5301ee83d26

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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