PT-2019-12998 · Linux · Linux Kernel

Published 2019-06-18 · Updated 2020-06-29 · CVE-2019-12881

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel version 4.15.0

Description The issue allows local users to cause a denial of service or possibly have other unspecified impacts. This is achieved through crafted ioctl calls to /dev/dri/card0, leveraging the i915 gem userptr get pages function in the drivers/gpu/drm/i915/i915 gem userptr.c file. The impact includes a NULL pointer dereference and a BUG.

Recommendations For Linux kernel version 4.15.0, consider disabling the i915 gem userptr get pages function as a temporary workaround until a patch is available. Restrict access to the /dev/dri/card0 device file to minimize the risk of exploitation. Avoid using crafted ioctl calls to /dev/dri/card0 until the issue is resolved.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2019-12881

Affected Products

Linux Kernel

References · 10

• 🔥 https://gist.github.com/oxagast/472866fb2c3d439e10499d7141d0a520 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-12881 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-12881 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-12881 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12881 · Security Note
• https://ubuntu.com/security/CVE-2019-12881 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-12881 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-12881 · Security Note
• http://securityfocus.com/bid/108873 · Note
• https://security.netapp.com/advisory/ntap-20190710-0002 · Note