CVE-2026-45853

Local kernel memory corruption via mismatched deallocation

Published May 27, 2026 · Updated May 27, 2026

Memory corruption in the Linux Kernel amdgpu driver allows local users to corrupt kernel memory during NPS range cleanup. In amdgpu_gmc_get_nps_memranges(), memory allocated through kvcalloc(), and potentially backed by vmalloc(), is released with kfree(). The corruption occurs when kvcalloc() uses vmalloc() and the returned ranges are released; published material documents no exploit.

CVSS severity0.0
None
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux Kernel amdgpu driver allows local users to corrupt kernel memory during NPS range cleanup. In amdgpu_gmc_get_nps_memranges(), memory allocated through kvcalloc(), and potentially backed by vmalloc(), is released with kfree(). The corruption occurs when kvcalloc() uses vmalloc() and the returned ranges are released; published material documents no exploit.

The record

CVE
CVE-2026-45853
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-763
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=6.11
  2. Affected versionversion=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <0c44d61945c4a80775292d96460aa2f22e62f86c
  3. Affected versionversion=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <16e7e7ad8cdc6b4c4af7f31e262f1494c1b2a55e
  4. Affected versionversion=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <9ae85b0c1909b6c6bfd2636b04cdaf7f520bf2b5
  5. Affected versionversion=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <f441538893eba6347b983f2904819ca6c99da65e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <0c44d61945c4a80775292d96460aa2f22e62f86c; version=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <16e7e7ad8cdc6b4c4af7f31e262f1494c1b2a55e; version=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <9ae85b0c1909b6c6bfd2636b04cdaf7f520bf2b5; version=b194d21b9bcc15b50df1bc3ff7428e51c2918a6f <f441538893eba6347b983f2904819ca6c99da65e

Published CVSS scores

0.0Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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-763Release of Invalid Pointer or Reference

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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