Denial of service in Linux Kernel

1) Integer overflow

EUVDB-ID: #VU11182

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6927

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The weakness exists in the futex_requeue function due to integer overflow. A local attacker can trigger a negative wake or requeue value and cause the service to crash.

Mitigation

Update to version 4.14.15.

Vulnerable software versions

Linux kernel: 4.0.1 - 4.14.14

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.2.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.2.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.2.2:*:*:*:*:*:*:*

External links

https://github.com/torvalds/linux/commit/fbe0e839d1e22d88810f3ee3e2f1479be4c0aa4a

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.