CVE-2022-49492

Kernel crash via invalid admin queue quiesce

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 3.19 through 5.18.2 allows local users to crash the system during an NVMe controller reset. nvme_alloc_admin_tags stores an ERR_PTR from blk_mq_init_queue in admin_q, but nvme_suspend_queue checks only for NULL and quiesces the invalid queue. Reaching the fault requires local low-privileged access, an NVMe PCI controller reset, and queue-allocation failure; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in Linux kernel 3.19 through 5.18.2 allows local users to crash the system during an NVMe controller reset. nvme_alloc_admin_tags stores an ERR_PTR from blk_mq_init_queue in admin_q, but nvme_suspend_queue checks only for NULL and quiesces the invalid queue. Reaching the fault requires local low-privileged access, an NVMe PCI controller reset, and queue-allocation failure; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2022-49492
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.19
  2. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <54a4c1e47d1b2585e74920399455bd9abbfb2bd7
  3. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <7a28556082d1fbcbc599baf1c24252dfc73efefc
  4. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <8321b17789f614414206af07e17ce4751c95dc76
  5. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <8da2b7bdb47e94bbc4062a3978c708926bcb022c
  6. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <906c81dba8ee8057523859b5e1a2479e9fd34860
  7. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <9e649471b396fa0139d53919354ce1eace9b9a24
  8. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <af98940dd33c9f9e1beb4f71c0a39260100e2a65
  9. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <da42761181627e9bdc37d18368b827948a583929
  10. Affected versionversion=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <f76729662650cd7bc8f8194e057af381370349a7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.19; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <54a4c1e47d1b2585e74920399455bd9abbfb2bd7; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <7a28556082d1fbcbc599baf1c24252dfc73efefc; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <8321b17789f614414206af07e17ce4751c95dc76; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <8da2b7bdb47e94bbc4062a3978c708926bcb022c; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <906c81dba8ee8057523859b5e1a2479e9fd34860; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <9e649471b396fa0139d53919354ce1eace9b9a24; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <af98940dd33c9f9e1beb4f71c0a39260100e2a65; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <da42761181627e9bdc37d18368b827948a583929; version=35b489d32fcc37e8735f41aa794b24cf9d1e74f5 <f76729662650cd7bc8f8194e057af381370349a7

Published CVSS scores

5.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo