CVE-2024-50091

Local kernel and data corruption via stale context

Published Nov 5, 2024 · Updated Aug 5, 2026

Use-after-free in Linux dm-vdo 6.9 through 6.11.3 allows local users to corrupt kernel memory through writes to a VDO-backed volume. The query_index() timeout path releases a pooled dedupe_context without clearing data_vio->dedupe_context, so later work follows a stale or reassigned request pointer. Write access to an already configured VDO volume is required; sustained I/O can expose or corrupt stored blocks, crash the kernel, or hang storage teardown.

CVSS severity7.8
High
EPSS probability0.21%
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 dm-vdo 6.9 through 6.11.3 allows local users to corrupt kernel memory through writes to a VDO-backed volume. The query_index() timeout path releases a pooled dedupe_context without clearing data_vio->dedupe_context, so later work follows a stale or reassigned request pointer. Write access to an already configured VDO volume is required; sustained I/O can expose or corrupt stored blocks, crash the kernel, or hang storage teardown.

The record

CVE
CVE-2024-50091
Published
Nov 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2024CVE 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=6.9
  2. Affected versionversion=cfaf07fae7a262865a67b6010eef3bc0a1ae50b2 <0808ebf2f80b962e75741a41ced372a7116f1e26
  3. Affected versionversion=cfaf07fae7a262865a67b6010eef3bc0a1ae50b2 <63ef073084c67878d7a92e15ad055172da3f05a3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=cfaf07fae7a262865a67b6010eef3bc0a1ae50b2 <0808ebf2f80b962e75741a41ced372a7116f1e26; version=cfaf07fae7a262865a67b6010eef3bc0a1ae50b2 <63ef073084c67878d7a92e15ad055172da3f05a3

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Canonical UbuntuCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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