CVE-2023-53309

Kernel crash via Radeon parser integer overflow

Published Sep 16, 2025 · Updated May 11, 2026

Integer overflow in the Radeon DRM command parser in the Linux kernel allows local users to crash affected systems. The radeon_cs_parser_init function multiplies an attacker-controlled unsigned chunk count by four in 32-bit storage, so 0x40000000 wraps the allocation size to zero and later code references uninitialized memory. Exploitation requires low-privileged local access and the Radeon DRM command-submission path; the documented consequence is a kernel crash.

CVSS severity5.5
Medium
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

Integer overflow in the Radeon DRM command parser in the Linux kernel allows local users to crash affected systems. The radeon_cs_parser_init function multiplies an attacker-controlled unsigned chunk count by four in 32-bit storage, so 0x40000000 wraps the allocation size to zero and later code references uninitialized memory. Exploitation requires low-privileged local access and the Radeon DRM command-submission path; the documented consequence is a kernel crash.

The record

CVE
CVE-2023-53309
Published
Sep 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE 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=28a326c592e3e444c59f28b3e60c3b07692928d6 <25e634d7f44eb13113139040e5366bebe48c882f
  2. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <2e1be420b86980c25a75325e90dfc3fc73126f61
  3. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <b8fab6aebdf2115ec2d7bd2f3498d5b911ff351e
  4. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <c0d7dbc6b7a61a56028118c00af2c8319d44a682
  5. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <cfa9148bafb2d3292b65de1bac79dcca65be2643
  6. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <d05ba46134d07e889de7d23cf8503574a22ede09
  7. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <e6825b30d37fe89ceb87f926d33d4fad321a331e
  8. Affected versionversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <f828b681d0cd566f86351c0b913e6cb6ed8c7b9c
  9. Affected versionversion=3.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=28a326c592e3e444c59f28b3e60c3b07692928d6 <25e634d7f44eb13113139040e5366bebe48c882f; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <2e1be420b86980c25a75325e90dfc3fc73126f61; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <b8fab6aebdf2115ec2d7bd2f3498d5b911ff351e; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <c0d7dbc6b7a61a56028118c00af2c8319d44a682; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <cfa9148bafb2d3292b65de1bac79dcca65be2643; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <d05ba46134d07e889de7d23cf8503574a22ede09; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <e6825b30d37fe89ceb87f926d33d4fad321a331e; version=28a326c592e3e444c59f28b3e60c3b07692928d6 <f828b681d0cd566f86351c0b913e6cb6ed8c7b9c; version=3.13

Published CVSS scores

5.5NVDCVSS: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

CWE-190Integer Overflow or Wraparound
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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