Use-after-free in Linux kernel - CVE-2026-68144
Published: August 12, 2026
Vulnerability identifier: #VU142162
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68144
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in pep_get_sb() when processing Phonet socket buffer data. A remote attacker can send a specially crafted network packet to cause a denial of service.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-68144
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
External References
- https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d
- https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054
- https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2
- https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee
- https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f