#VU6658 Memory corruption in Linux kernel - CVE-2017-7294

Vulnerability identifier: #VU6658

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7294

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows a local attacker to cause DoS condition or gain elevated privileges on the target system.

The weakness exists in the vmw_surface_define_ioctl function in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c due to missing validation of addition of certain levels data. A local attacker can trigger integer overflow and out-of-bounds write, cause the service to crash or possibly gain root privileges via a crafted ioctl call for a /dev/dri/renderD* device.

Mitigation
Update to version 4.10.6.

Vulnerable software versions

Linux kernel: 4.10 - 4.10.5

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1436798

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.