CVE-2022-49694

Kernel memory corruption via block teardown use-after-free

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in Linux 5.16 through 5.18.7 and 5.19-rc1 through 5.19-rc3 allows local users to corrupt kernel memory. disk_release can access q->tag_set after its lifetime ends because elevator shutdown and scheduler-tag cleanup occur after file-system requests stop but before the disk is released. Low-privileged local access is required; the published record reports confidentiality, integrity, and availability consequences but does not disclose a reliable trigger sequence.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux 5.16 through 5.18.7 and 5.19-rc1 through 5.19-rc3 allows local users to corrupt kernel memory. disk_release can access q->tag_set after its lifetime ends because elevator shutdown and scheduler-tag cleanup occur after file-system requests stop but before the disk is released. Low-privileged local access is required; the published record reports confidentiality, integrity, and availability consequences but does not disclose a reliable trigger sequence.

The record

CVE
CVE-2022-49694
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
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=5.16
  2. Affected versionversion=e155b0c238b20f0a866f4334d292656665836c8a <50e34d78815e474d410f342fbe783b18192ca518
  3. Affected versionversion=e155b0c238b20f0a866f4334d292656665836c8a <f28699fafc047ec33299da01e928c3a0073c5cc6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=e155b0c238b20f0a866f4334d292656665836c8a <50e34d78815e474d410f342fbe783b18192ca518; version=e155b0c238b20f0a866f4334d292656665836c8a <f28699fafc047ec33299da01e928c3a0073c5cc6

Published CVSS scores

7.8CISA-ADPCVSS: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

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-416Use After Free

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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