CVE-2023-52816

Local memory corruption via unchecked SVM granularity

Published May 21, 2024 · Updated May 11, 2026

Out-of-bounds write in AMD KFD SVM code in affected Linux kernel releases allows local users to corrupt memory via a crafted granularity. The svm_range_apply_attrs function copies the 32-bit KFD_IOCTL_SVM_ATTR_GRANULARITY value into prange->granularity without limiting it, so migration code can use values above 63 as a 64-bit shift exponent. Low-privileged local access to an AMD GPU with the KFD SVM path is required; the undefined shift occurs in kernel context.

CVSS severity7.8
High
EPSS probability0.24%
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 write in AMD KFD SVM code in affected Linux kernel releases allows local users to corrupt memory via a crafted granularity. The svm_range_apply_attrs function copies the 32-bit KFD_IOCTL_SVM_ATTR_GRANULARITY value into prange->granularity without limiting it, so migration code can use values above 63 as a 64-bit shift exponent. Low-privileged local access to an AMD GPU with the KFD SVM path is required; the undefined shift occurs in kernel context.

The record

CVE
CVE-2023-52816
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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=42de677f79999791bee4e21be318c32d90ab62c6 <2806f880379232e789957c2078d612669eb7a69c
  2. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <282c1d793076c2edac6c3db51b7e8ed2b41d60a5
  3. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <3f7a400d5e80f99581e3e8a9843e1f6118bf454f
  4. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <56649c43d40ce0147465a2d5756d300e87f9ee1c
  5. Affected versionversion=42de677f79999791bee4e21be318c32d90ab62c6 <d33a35b13cbfec3238043f196fa87a6384f9d087
  6. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=42de677f79999791bee4e21be318c32d90ab62c6 <2806f880379232e789957c2078d612669eb7a69c; version=42de677f79999791bee4e21be318c32d90ab62c6 <282c1d793076c2edac6c3db51b7e8ed2b41d60a5; version=42de677f79999791bee4e21be318c32d90ab62c6 <3f7a400d5e80f99581e3e8a9843e1f6118bf454f; version=42de677f79999791bee4e21be318c32d90ab62c6 <56649c43d40ce0147465a2d5756d300e87f9ee1c; version=42de677f79999791bee4e21be318c32d90ab62c6 <d33a35b13cbfec3238043f196fa87a6384f9d087; version=5.14

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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