CVE-2026-74352

Local system crash via stale reserved_mem pointer

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in Linux 6.13 and affected later branches allows local users to crash the system through a reserved-memory lookup. When alloc_reserved_mem_array() fails, reserved_mem still points to an __initdata array that initialization later frees. A later call to exported of_reserved_mem_lookup() dereferences that stale pointer; exploitation requires local low-privileged access and the initialization-time allocation failure.

CVSS severity6.8
Medium
EPSS probability0.17%
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 6.13 and affected later branches allows local users to crash the system through a reserved-memory lookup. When alloc_reserved_mem_array() fails, reserved_mem still points to an __initdata array that initialization later frees. A later call to exported of_reserved_mem_lookup() dereferences that stale pointer; exploitation requires local low-privileged access and the initialization-time allocation failure.

The record

CVE
CVE-2026-74352
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=00c9a452a235c61f099504783badd9a7675ff5a5 <9af58d10d0d8c08b822de5fc99e61f31a87ede8d
  2. Affected versionversion=00c9a452a235c61f099504783badd9a7675ff5a5 <cbd3102fe27bc87da244bf4c3ba670ea4698b0a8
  3. Affected versionversion=00c9a452a235c61f099504783badd9a7675ff5a5 <e1686ca81dbf3edbde589b7daf312b45cbf76e03
  4. Affected versionversion=6.13
  5. Affected versionversion=b6ae53301eb41f0f59f83c161248b186bca7da70 <6d28e6ad3c5c9248577f21057baa9bf16fa9ef3b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=00c9a452a235c61f099504783badd9a7675ff5a5 <9af58d10d0d8c08b822de5fc99e61f31a87ede8d; version=00c9a452a235c61f099504783badd9a7675ff5a5 <cbd3102fe27bc87da244bf4c3ba670ea4698b0a8; version=00c9a452a235c61f099504783badd9a7675ff5a5 <e1686ca81dbf3edbde589b7daf312b45cbf76e03; version=6.13; version=b6ae53301eb41f0f59f83c161248b186bca7da70 <6d28e6ad3c5c9248577f21057baa9bf16fa9ef3b

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS: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

T1499Endpoint Denial of Service

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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