CVE-2024-50250

Local data corruption and disclosure via unaligned unshare

Published Nov 9, 2024 · Updated Aug 5, 2026

Data corruption and disclosure in Linux fsdax allow local users to expose stale pmem or overwrite file data through an unaligned unshare. dax_unshare_iter uses a page-start pointer with an unaligned iterator and copies only part of the destination block, misplacing data and leaving stale bytes. A writable XFS DAX file with shared blocks is required; the operation can disclose freed-block contents, corrupt files, or force filesystem shutdown.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data corruption and disclosure in Linux fsdax allow local users to expose stale pmem or overwrite file data through an unaligned unshare. dax_unshare_iter uses a page-start pointer with an unaligned iterator and copies only part of the destination block, misplacing data and leaving stale bytes. A writable XFS DAX file with shared blocks is required; the operation can disclose freed-block contents, corrupt files, or force filesystem shutdown.

The record

CVE
CVE-2024-50250
Published
Nov 9, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 9, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1bec6782a25c9b92c203ea7a1b3e3dc6a468cbc4 <bdbc96c23197d773a7d1bf03e4f11de593b0ff28
  2. Affected versionversion=6.1.113 <6.1.116
  3. Affected versionversion=6.2
  4. Affected versionversion=d984648e428bf88cbd94ebe346c73632cb92fffb <50793801fc7f6d08def48754fb0f0706b0cfc394
  5. Affected versionversion=d984648e428bf88cbd94ebe346c73632cb92fffb <8e9c0f500b42216ef930f5c0d1703989a451913d
  6. Affected versionversion=d984648e428bf88cbd94ebe346c73632cb92fffb <9bc18bb476e50e32e5d08f2734d63d63e0fa528c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1bec6782a25c9b92c203ea7a1b3e3dc6a468cbc4 <bdbc96c23197d773a7d1bf03e4f11de593b0ff28; version=6.1.113 <6.1.116; version=6.2; version=d984648e428bf88cbd94ebe346c73632cb92fffb <50793801fc7f6d08def48754fb0f0706b0cfc394; version=d984648e428bf88cbd94ebe346c73632cb92fffb <8e9c0f500b42216ef930f5c0d1703989a451913d; version=d984648e428bf88cbd94ebe346c73632cb92fffb <9bc18bb476e50e32e5d08f2734d63d63e0fa528c

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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

No sourced classifications are available.

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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