SB2019123154 - Out-of-bounds read in Linux kernel
Published: December 31, 2019
Security Bulletin ID
SB2019123154
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2019-19927)
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.
Remediation
Install update from vendor's website.
References
- 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/