Linux Kernel up to 4.14.14 kernel/futex.c futex_requeue integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.14.14 and classified as problematic. Affected by this issue is the function futex_requeue of the file kernel/futex.c. Such manipulation leads to integer overflow. This vulnerability is referenced as CVE-2018-6927. The attack can only be performed from a local environment. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.14.14 (Operating System) and classified as problematic. Affected by this issue is the function futex_requeue of the file kernel/futex.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is availability. CVE summarizes:

The futex_requeue function in kernel/futex.c in the Linux kernel before 4.14.15 might allow attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact by triggering a negative wake or requeue value.

The bug was discovered 01/14/2018. The weakness was published 02/12/2018 (Website). The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2018-6927 since 02/12/2018. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 29 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109380 (CentOS 7 : kernel (CESA-2018:1062)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351263 (Amazon Linux Security Advisory for kernel: ALAC2012-2018-002).

Upgrading to version 4.14.15 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109380), SecurityFocus (BID 103023†) and CERT Bund (WID-SEC-2022-0532). Similar entries are available at VDB-104315, VDB-106966, VDB-110109 and VDB-110311. Once again VulDB remains the best source for vulnerability data.

Affected

  • Oracle Linux
  • Debian Linux
  • Open Source Linux Kernel
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle VM
  • NetApp FAS
  • Avaya Aura Communication Manager
  • Avaya Aura Session Manager
  • Avaya Aura Application Enablement Services
  • Avaya Aura System Manager
  • Avaya Aura Experience Portal
  • NetApp AFF

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109380
Nessus Name: CentOS 7 : kernel (CESA-2018:1062)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 61945
OpenVAS Name: Ubuntu Update for linux-aws USN-3619-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.14.15
Patch: git.kernel.org

Timelineinfo

01/14/2018 🔍
02/12/2018 +29 days 🔍
02/12/2018 +0 days 🔍
02/12/2018 +0 days 🔍
02/12/2018 +0 days 🔍
02/13/2018 +1 days 🔍
04/27/2018 +73 days 🔍
04/27/2018 +0 days 🔍
09/14/2025 +2697 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:1062
Researcher: UBSAN
Status: Confirmed

CVE: CVE-2018-6927 (🔍)
GCVE (CVE): GCVE-0-2018-6927
GCVE (VulDB): GCVE-100-113180

OVAL: 🔍

SecurityFocus: 103023 - Linux Kernel 'kernel/futex.c' Local Denial of Service Vulnerability
CERT Bund: WID-SEC-2022-0532 - Linux Kernel: Mehrere Schwachstellen

See also: 🔍

Entryinfo

Created: 02/13/2018 09:24
Updated: 09/14/2025 05:15
Changes: 02/13/2018 09:24 (80), 01/04/2020 10:46 (4), 02/03/2021 09:47 (3), 02/06/2023 14:06 (4), 02/06/2023 14:08 (1), 09/14/2025 05:15 (21)
Complete: 🔍
Cache ID: 216::103

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