CVE-2022-49826

Kernel crash via double ATA host release

Published May 1, 2025 · Updated Aug 5, 2026

Double free in the Linux kernel 4.17 through 6.0.9 allows local users to crash the kernel during failed ATA device unbinding. The ata_tport_add error path calls put_device, whose release callback drops ap->host, and then redundantly calls ata_host_put, freeing all ports. Reachability requires an ATA transport-add failure followed by device unbinding; ata_host_stop then dereferences a freed, NULL port and interrupts the host.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the Linux kernel 4.17 through 6.0.9 allows local users to crash the kernel during failed ATA device unbinding. The ata_tport_add error path calls put_device, whose release callback drops ap->host, and then redundantly calls ata_host_put, freeing all ports. Reachability requires an ATA transport-add failure followed by device unbinding; ata_host_stop then dereferences a freed, NULL port and interrupts the host.

The record

CVE
CVE-2022-49826
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2623c7a5f2799569d8bb05eb211da524a8144cb3 <30e12e2be27ac6c4be2af4163c70db381364706f
  2. Affected versionversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <377ff82c33c0cb74562a353361b64b33c09562cf
  3. Affected versionversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <865a6da40ba092c18292ae5f6194756131293745
  4. Affected versionversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <8c76310740807ade5ecdab5888f70ecb6d35732e
  5. Affected versionversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <ac471468f7c16cda2525909946ca13ddbcd14000
  6. Affected versionversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <bec9ded5404cb14e5f5470103d0973a2ff83d6a5
  7. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2623c7a5f2799569d8bb05eb211da524a8144cb3 <30e12e2be27ac6c4be2af4163c70db381364706f; version=2623c7a5f2799569d8bb05eb211da524a8144cb3 <377ff82c33c0cb74562a353361b64b33c09562cf; version=2623c7a5f2799569d8bb05eb211da524a8144cb3 <865a6da40ba092c18292ae5f6194756131293745; version=2623c7a5f2799569d8bb05eb211da524a8144cb3 <8c76310740807ade5ecdab5888f70ecb6d35732e; version=2623c7a5f2799569d8bb05eb211da524a8144cb3 <ac471468f7c16cda2525909946ca13ddbcd14000; version=2623c7a5f2799569d8bb05eb211da524a8144cb3 <bec9ded5404cb14e5f5470103d0973a2ff83d6a5; version=4.17

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-415Double Free
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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