Vulnerability identifier: #VU6644

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-10208

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system
linux_kernel (Debian package)
Operating systems & Components / Operating system package or component

Vendor: Linux Foundation
Debian

Description
The vulnerability allows a local attacker to cause DoS condition on the target systsem.

The weakness exists due to memory corruption when validating meta block groups by the ext4_fill_super function. A local attacker can use a specially crafted EXT4 image to trigger an out-of-bounds read and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 4.9.9.

Vulnerable software versions

Linux kernel: 4.9.1 - 4.9.8, 4.8.0 - 4.8.17, 4.7.0 - 4.7.10, 4.6.0 - 4.6.7, 4.5.0 - 4.5.7, 4.4.0 - 4.4.70, 4.3.1 - 4.3.6, 4.2.0 - 4.2.8, 4.1.1 - 4.1.40, 4.0.1 - 4.0.9

linux_kernel (Debian package): 4.6.4-1 - 4.7.2-1

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External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3a4b77cd47bb837b855759...

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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.