PT-2021-19512 · Imagination Technologies+1 · Pvrsrvkm.Ko+2

Ayaz Mammadov · Published 2021-04-24 · Updated 2021-05-06 · CVE-2021-31795

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions PowerVR GPU kernel driver versions through 2021-04-24

Description The issue allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR. This affects the PowerVR GPU kernel driver in pvrsrvkm.ko for the Linux kernel, as used on Alcatel 1S phones.

Recommendations For versions through 2021-04-24, consider disabling the PhysmemNewRamBackedPMR function as a temporary workaround until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-31795

Affected Products

Alcatel 1S

Powervr Kernel Driver

Pvrsrvkm.Ko

References · 6

• 🔥 https://mcyoloswagham.github.io/linux · Exploit
• https://osv.dev/vulnerability/CVE-2021-31795 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31795 · Security Note
• https://t.me/cvenotify/14169 · Telegram Post
• https://t.me/cvenotify/13660 · Telegram Post
• https://t.me/cvenotify/13717 · Telegram Post