CVE-2024-50278

Kernel memory disclosure via undersized dm-cache bitset

Published Nov 19, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel dm-cache target allows local users to disclose kernel memory through cache suspension. cache_create sizes the dirty bitset and hint array from the original fast device, while cache_preresume skips the size-change check on the first resume. Reachability requires local access, an active dm-cache mapping, an expanded fast device before its first resume, and a later suspend; the read can expose memory or interrupt the system.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel dm-cache target allows local users to disclose kernel memory through cache suspension. cache_create sizes the dirty bitset and hint array from the original fast device, while cache_preresume skips the size-change check on the first resume. Reachability requires local access, an active dm-cache mapping, an expanded fast device before its first resume, and a later suspend; the read can expose memory or interrupt the system.

The record

CVE
CVE-2024-50278
Published
Nov 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 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=3.13
  2. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <036dd6e3d2638103e0092864577ea1d091466b86
  3. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <13ed3624c6ef283acefa4cc42cc8ae54fd4391a4
  4. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <2222b0929d00e2d13732b799b63be391b5de4492
  5. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <483b7261b35a9d369082ab298a6670912243f0be
  6. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <c0ade5d98979585d4f5a93e4514c2e9a65afa08d
  7. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <c52ec00cb2f9bebfada22edcc0db385b910a1cdb
  8. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <e492f71854ce03474d49e87fd98b8df1f7cd1d2d
  9. Affected versionversion=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <fdef3b94dfebd57e3077a578b6e309a2bb6fa688

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.13; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <036dd6e3d2638103e0092864577ea1d091466b86; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <13ed3624c6ef283acefa4cc42cc8ae54fd4391a4; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <2222b0929d00e2d13732b799b63be391b5de4492; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <483b7261b35a9d369082ab298a6670912243f0be; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <c0ade5d98979585d4f5a93e4514c2e9a65afa08d; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <c52ec00cb2f9bebfada22edcc0db385b910a1cdb; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <e492f71854ce03474d49e87fd98b8df1f7cd1d2d; version=f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 <fdef3b94dfebd57e3077a578b6e309a2bb6fa688

Published CVSS scores

7.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

CWE-125Out-of-bounds Read

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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