Double free in Linux kernel - CVE-2026-31730
Published: May 2, 2026
Vulnerability identifier: #VU128966
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31730
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to double free in fastrpc_init_create_static_process() and fastrpc_rpmsg_remove() when handling the INIT_CREATE_STATIC ioctl error path followed by rpmsg device removal or unbind. A local user can trigger the INIT_CREATE_STATIC ioctl error path and subsequently cause the rpmsg device to be removed or unbound to cause a denial of service.
How to mitigate CVE-2026-31730
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0bdee4118340c5a756220c1b29a7dab86bb0aa65
- https://git.kernel.org/stable/c/3a164f640953cc982804746e772d379171aff5c6
- https://git.kernel.org/stable/c/4b8e527aca357a6488680713bd88007cf8f547fe
- https://git.kernel.org/stable/c/ba2c83167b215da30fa2aae56b140198cf8d8408
- https://git.kernel.org/stable/c/f67d368d26764a357691b2b3a33d3cb55b435bfc