Release of invalid pointer or reference in Linux kernel - CVE-2026-90387
Published: September 18, 2026
Vulnerability identifier: #VU151083
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-90387
CWE-ID: CWE-763
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-90387
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/35e0103177826430b5df888b1506239d41e76ab5
- https://git.kernel.org/stable/c/45507dcb0847e96add4455274b12df0eca6590b4
- https://git.kernel.org/stable/c/57d29044d0f29a76c6ec0c112c8c7371d5608dc7
- https://git.kernel.org/stable/c/68bf3ebd8e7020dae58e8aa14c7d482738bff9a8
- https://git.kernel.org/stable/c/c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319