Integer overflow in Pixel - CVE-2021-39714

Vulnerability identifier: #VU64880

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-39714

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to integer overflow within the ion_buffer_kmap_get() function in ion.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Pixel
Ubuntu
linux-image-kvm (Ubuntu package)
linux-image-4.4.0-1110-kvm (Ubuntu package)
linux-image-generic-lts-xenial (Ubuntu package)
linux-image-4.4.0-229-lowlatency (Ubuntu package)
linux-image-lowlatency-lts-xenial (Ubuntu package)
linux-image-4.4.0-229-generic (Ubuntu package)
linux-image-virtual-lts-xenial (Ubuntu package)
linux-image-4.4.0-1109-aws (Ubuntu package)
linux-image-aws (Ubuntu package)

Install updates from vendor's website.

Pixel - update to 2022-03-05
linux-image-kvm (Ubuntu package) - update to 4.4.0.1110.107
linux-image-4.4.0-1110-kvm (Ubuntu package) - update to 4.4.0.1110.107
linux-image-generic-lts-xenial (Ubuntu package) - update to 4.4.0.1110.107
linux-image-4.4.0-229-lowlatency (Ubuntu package) - update to 4.4.0.1110.107
linux-image-lowlatency-lts-xenial (Ubuntu package) - update to 4.4.0.1110.107
linux-image-4.4.0-229-generic (Ubuntu package) - update to 4.4.0.1110.107
linux-image-virtual-lts-xenial (Ubuntu package) - update to 4.4.0.1110.107
linux-image-4.4.0-1109-aws (Ubuntu package) - update to 4.4.01109.115
linux-image-aws (Ubuntu package) - update to 4.4.01109.115

• https://source.android.com/security/bulletin/pixel/2022-03-01

• Multiple vulnerabilities in Google Pixel
• Ubuntu update for linux-kvm
• Ubuntu update for linux-aws