Double free in Linux kernel - CVE-2026-74519
Published: August 16, 2026
Vulnerability identifier: #VU143254
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-74519
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to double free in dt_remember_or_free_map() and dt_free_map() in the pinctrl devicetree code when handling a failed dev_name duplication during map initialization. A local attacker can trigger a memory allocation failure during device binding to cause a denial of service.
Exploitation was demonstrated with failslab injection while binding a pinctrl-consuming device.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74519
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1
External References
- https://git.kernel.org/stable/c/015b5bcbcb622b32317642be91a7f79aa5413649
- https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75
- https://git.kernel.org/stable/c/929f6396baade89999ec8a1281232c101cbc727d
- https://git.kernel.org/stable/c/9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d
- https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8