CVE-2024-50080

Kernel data disclosure via unfilled request buffers

Published Oct 29, 2024 · Updated May 11, 2026

Information disclosure in the ublk driver in Linux allows local users to read uninitialized kernel data through an unprivileged block device. ublk_ctrl_add_dev accepts both UBLK_F_UNPRIVILEGED_DEV and UBLK_F_USER_COPY, letting an untrusted server skip the required pwrite() and expose uninitialized request-buffer contents. Local low-privileged access and creation of an unprivileged ublk device are required, and the bounded impact is kernel-memory disclosure.

CVSS severity5.5
Medium
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

Information disclosure in the ublk driver in Linux allows local users to read uninitialized kernel data through an unprivileged block device. ublk_ctrl_add_dev accepts both UBLK_F_UNPRIVILEGED_DEV and UBLK_F_USER_COPY, letting an untrusted server skip the required pwrite() and expose uninitialized request-buffer contents. Local low-privileged access and creation of an unprivileged ublk device are required, and the bounded impact is kernel-memory disclosure.

The record

CVE
CVE-2024-50080
Published
Oct 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 29, 2024CVE 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=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6
  2. Affected versionversion=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc
  3. Affected versionversion=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <8f3d5686a2409877c5e8e2540774d24ed2b4a4ce
  4. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6; version=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc; version=1172d5b8beca6b899deb9f7f2850e7e47ec16198 <8f3d5686a2409877c5e8e2540774d24ed2b4a4ce; version=6.5

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.

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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

T1005Data from Local System

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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