SB20260918281 - Release of invalid pointer or reference in Linux kernel dma

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Main Vulnerability Database SB20260918281

SB20260918281 - Release of invalid pointer or reference in Linux kernel dma

Published: September 18, 2026

Security Bulletin ID SB20260918281
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Release of invalid pointer or reference (CVE-ID: CVE-2026-90387)

CWE-ID: CWE-763 - Release of invalid pointer or reference

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a memory leak.

The vulnerability exists due to release of an invalid pointer in the swiotlb dynamic-pool allocation and free handling when allocating a decrypted pool from the DMA atomic pool in atomic context with CONFIG_DMA_DIRECT_REMAP enabled. A local user can trigger dynamic swiotlb pool allocation to cause a memory leak.

The atomic pool can use remapped virtual addresses that differ from direct-map addresses.


Remediation

Install update from vendor's website.

References