Out-of-bounds read in Linux kernel - CVE-2019-19927
Published: December 31, 2019 / Updated: May 14, 2020
Vulnerability identifier: #VU92773
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-19927
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local privileged user to read data or crash the application.
In the Linux kernel 5.0.0-rc7 (as distributed in ubuntu/linux.git on kernel.ubuntu.com), mounting a crafted f2fs filesystem image and performing some operations can lead to slab-out-of-bounds read access in ttm_put_pages in drivers/gpu/drm/ttm/ttm_page_alloc.c. This is related to the vmwgfx or ttm module.
How to mitigate CVE-2019-19927
Install update from vendor's repository.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19927
- https://github.com/torvalds/linux/commit/453393369dc9806d2455151e329c599684762428
- https://github.com/torvalds/linux/commit/a66477b0efe511d98dde3e4aaeb189790e6f0a39
- https://github.com/torvalds/linux/commit/ac1e516d5a4c56bf0cb4a3dfc0672f689131cfd4
- https://security.netapp.com/advisory/ntap-20200204-0002/