Information disclosure in Linux Kernel
CVE-2017-9605
The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2017/dsa-3927 (vendor-advisory)
- github.com/torvalds/linux/commit/07678eca2cf9c9a18584e546c2b2a0d0c9a3150c (Patch, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2017/dsa-3945 (vendor-advisory)
- www.securityfocus.com/bid/99095 (VDB Entry, Third Party Advisory, vdb-entry)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-9605?
- CVE-2017-9605 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2017-06-13.
- How severe is CVE-2017-9605?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2017-9605 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.