CVE-2024-50182

Secret-memory read and write via retained direct-map aliases

Published Nov 8, 2024 · Updated Aug 5, 2026

Improper memory protection in Linux allows local users to read and modify secretmem content on affected arm64 systems. In mm/secretmem.c, set_direct_map_invalid_noflush() becomes a no-op when can_set_direct_map() is false but returns success, so memfd_secret() maps pages without removing their direct-map aliases. Exposure requires an arm64 build with CONFIG_RODATA_FULL_DEFAULT_ENABLED, CONFIG_DEBUG_PAGEALLOC, and CONFIG_KFENCE all disabled; most arm64 builds are unaffected because the first option defaults to enabled.

CVSS severity7.1
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

Improper memory protection in Linux allows local users to read and modify secretmem content on affected arm64 systems. In mm/secretmem.c, set_direct_map_invalid_noflush() becomes a no-op when can_set_direct_map() is false but returns success, so memfd_secret() maps pages without removing their direct-map aliases. Exposure requires an arm64 build with CONFIG_RODATA_FULL_DEFAULT_ENABLED, CONFIG_DEBUG_PAGEALLOC, and CONFIG_KFENCE all disabled; most arm64 builds are unaffected because the first option defaults to enabled.

The record

CVE
CVE-2024-50182
Published
Nov 8, 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 8, 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=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <532b53cebe58f34ce1c0f34d866f5c0e335c53c6
  2. Affected versionversion=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <5ea0b7af38754d2b45ead9257bca47e84662e926
  3. Affected versionversion=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <757786abe4547eb3d9d0e8350a63bdb0f9824af2
  4. Affected versionversion=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <7caf966390e6e4ebf42775df54e7ee1f280ce677
  5. Affected versionversion=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <d0ae6ffa1aeb297aef89f49cfb894a83c329ebad
  6. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <532b53cebe58f34ce1c0f34d866f5c0e335c53c6; version=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <5ea0b7af38754d2b45ead9257bca47e84662e926; version=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <757786abe4547eb3d9d0e8350a63bdb0f9824af2; version=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <7caf966390e6e4ebf42775df54e7ee1f280ce677; version=1507f51255c9ff07d75909a84e7c0d7f3c4b2f49 <d0ae6ffa1aeb297aef89f49cfb894a83c329ebad; version=5.14

Published CVSS scores

7.1Linux kernel CVE teamCVSS: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 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

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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