Improper update of reference count in Linux kernel - CVE-2026-93223
Published: September 25, 2026
Vulnerability identifier: #VU152177
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93223
CWE-ID: CWE-911
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a reference count underflow of an Open Firmware node.
The vulnerability exists due to improper reference count management in tegra_vip_channel_of_parse() in the tegra-video VIP driver when parsing endpoint nodes from a malformed device tree. A local user can trigger an endpoint parsing error with a malformed device tree to cause a reference count underflow of an Open Firmware node.
Affected software
Linux kernel
How to mitigate CVE-2026-93223
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/1295ba29ac590bbb5c4a586afd408018168af10b
- https://git.kernel.org/stable/c/656d047dc0c29c0964d840217a0593f16aa9bc5e
- https://git.kernel.org/stable/c/7393372f79db940acff206b43e2905685a0c57ad
- https://git.kernel.org/stable/c/a3783800c9475fa58b8db0885893f96a23f949da
- https://git.kernel.org/stable/c/fc9937019cf7e2fe4e29f9341e6400bcd2cde721