CVE-2023-53084

Local privilege escalation via erroneous GEM object release

Published May 2, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel DRM shmem helper allows local users to gain kernel privileges via DRM render-node ioctls. drm_gem_shmem_mmap drops a reference it does not own after a dma_buf_mmap failure, prematurely freeing a shmem GEM object while a handle still references it. Access to a DRM render node and a rejected dma-buf mapping is required; later use of the dangling object enables kernel memory disclosure, corruption, or a kernel panic.

CVSS severity7.8
High
EPSS probability0.20%
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 the Linux kernel DRM shmem helper allows local users to gain kernel privileges via DRM render-node ioctls. drm_gem_shmem_mmap drops a reference it does not own after a dma_buf_mmap failure, prematurely freeing a shmem GEM object while a handle still references it. Access to a DRM render node and a rejected dma-buf mapping is required; later use of the dangling object enables kernel memory disclosure, corruption, or a kernel panic.

The record

CVE
CVE-2023-53084
Published
May 2, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE 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=4655afcf0e3874af03afff8c8704b52350bdba47
  2. Affected versionversion=5.10
  3. Affected versionversion=5.9.5 <5.10
  4. Affected versionversion=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <5cfb617967b05f8f27e862c97db1fabd8485f4db
  5. Affected versionversion=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <684c7372bbd6447c2e86a2a84e97a1478604d21f
  6. Affected versionversion=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <77d26c824aa5a7e0681ef1d5b75fe538d746addc
  7. Affected versionversion=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <dede8c14a37a7ac458f9add56154a074ed78e7cf
  8. Affected versionversion=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <ee9adb7a45516cfa536ca92253d7ae59d56db9e4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4655afcf0e3874af03afff8c8704b52350bdba47; version=5.10; version=5.9.5 <5.10; version=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <5cfb617967b05f8f27e862c97db1fabd8485f4db; version=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <684c7372bbd6447c2e86a2a84e97a1478604d21f; version=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <77d26c824aa5a7e0681ef1d5b75fe538d746addc; version=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <dede8c14a37a7ac458f9add56154a074ed78e7cf; version=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a <ee9adb7a45516cfa536ca92253d7ae59d56db9e4

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

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-416Use After Free
T1068Exploitation for Privilege Escalation

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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