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CVE-2026-53202 Linux CVE debrief

CVE-2026-53202 is a HIGH severity vulnerability in the Linux kernel, specifically in the accel/ivpu component. It involves a signed integer truncation issue in IPC receive that could lead to a potential buffer overflow. The vulnerability is caused by the casting of firmware-supplied data_size to a signed int before being used in min_t(). Large unsigned values (>= 0x80000000) become negative, causing unsigned wraparound and oversized memcpy operations that can overflow the stack buffer. The issue has been resolved by changing min_t(int, ...) to min() as both values are unsigned and can be handled by min() without explicit cast. This vulnerability has a CVSS score of 7.8 and is considered HIGH severity.

Vendor
Linux
Product
Unknown
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-25
Original CVE updated
2026-06-28
Advisory published
2026-06-25
Advisory updated
2026-06-28

Who should care

Linux kernel users and maintainers should be aware of this vulnerability. Specifically, those using the accel/ivpu component in their kernel configurations are at risk. The vulnerability could potentially allow local attackers to escalate privileges or cause denial-of-service conditions.

Technical summary

The vulnerability is located in the accel/ivpu component of the Linux kernel. The issue arises from the improper handling of firmware-supplied data_size in the IPC receive function. When data_size is a large unsigned value (>= 0x80000000), casting it to a signed int results in a negative number. This negative value is then used in min_t(), leading to an incorrect calculation of the minimum size. As a result, memcpy operations can overflow the stack buffer, potentially leading to privilege escalation or denial-of-service conditions. The fix involves replacing min_t(int, ...) with min(), which can handle unsigned values correctly without the need for explicit casting.

Defensive priority

This vulnerability should be prioritized for patching due to its HIGH severity and potential impact on system security. Linux kernel maintainers and users should apply the fix as soon as possible to prevent potential exploitation.

Recommended defensive actions

  • Apply the official patch from the Linux kernel maintainers.
  • Review and update Linux kernel configurations to ensure the accel/ivpu component is properly secured.
  • Monitor system logs for potential exploitation attempts.
  • Consider implementing additional security measures such as SELinux or other Mandatory Access Control (MAC) systems to limit the impact of potential exploits.
  • Perform regular vulnerability assessments and penetration testing to identify and address potential security weaknesses.

Evidence notes

The vulnerability was discovered and resolved in the Linux kernel. The CVE record and NVD details provide information on the vulnerability's characteristics and potential impact. The official CVE record and NVD detail pages offer additional context and resources for understanding and mitigating the vulnerability.

Official resources

This article is AI-assisted and based on the supplied source corpus.