CVE-2022-49156

Kernel crash via interrupt-context sleeping call

Published Feb 26, 2025 · Updated May 11, 2026

Execution-context misuse in the Linux kernel qla2xxx driver allows local users to crash affected systems during Fibre Channel port deletion. The qla2x00_schedule_rport_del path calls the sleeping fc_remote_port_delete midlayer routine from interrupt context instead of deferring the work. Reaching the flaw requires the qla2xxx Fibre Channel driver and a remote-port deletion event; the demonstrated consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Execution-context misuse in the Linux kernel qla2xxx driver allows local users to crash affected systems during Fibre Channel port deletion. The qla2x00_schedule_rport_del path calls the sleeping fc_remote_port_delete midlayer routine from interrupt context instead of deferring the work. Reaching the flaw requires the qla2xxx Fibre Channel driver and a remote-port deletion event; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2022-49156
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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 <78225d6a2a4ffdb2250ce2b7691a9e68a3f86912
  3. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <78612f2fe8e26637476d756a44f0f05cca0d97de
  4. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <7fef50214dd04427233a2e66cd624d468e67aecb
  5. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <826a9d4a00d1424afa961504aec6298ee92d5053
  6. Affected versionversion=726b85487067d7f5b23495bc33c484b8517c4074 <afd438ff874ca40b74321b3fa19bd61adfd7ca0c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=726b85487067d7f5b23495bc33c484b8517c4074 <78225d6a2a4ffdb2250ce2b7691a9e68a3f86912; version=726b85487067d7f5b23495bc33c484b8517c4074 <78612f2fe8e26637476d756a44f0f05cca0d97de; version=726b85487067d7f5b23495bc33c484b8517c4074 <7fef50214dd04427233a2e66cd624d468e67aecb; version=726b85487067d7f5b23495bc33c484b8517c4074 <826a9d4a00d1424afa961504aec6298ee92d5053; version=726b85487067d7f5b23495bc33c484b8517c4074 <afd438ff874ca40b74321b3fa19bd61adfd7ca0c

Published CVSS scores

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

T1499Endpoint Denial of Service

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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