GNU C Library 2.26 malloc integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical has been found in GNU C Library 2.26 (Software Library). This affects the function malloc. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 12/06/2017. The weakness was presented 12/05/2017 as Bug 22375 as not defined bug report (Bugzilla). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2017-17426 since 12/05/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 106014 (Fedora 27 : glibc (2017-fb5e227432)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197022 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-3534-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106014).







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
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NVD Base Score: 8.1
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Class: Integer overflow
CWE: CWE-190 / CWE-189
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 106014
Nessus Name: Fedora 27 : glibc (2017-fb5e227432)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 835249
OpenVAS Name: Fedora Update for glibc FEDORA-2017-fb5e227432
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

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Patch: 34697694e8a93b325b18f25f7dcded55d6baeaf6


12/05/2017 🔍
12/05/2017 +0 days 🔍
12/05/2017 +0 days 🔍
12/05/2017 +0 days 🔍
12/06/2017 +1 days 🔍
12/19/2017 +13 days 🔍
01/15/2018 +27 days 🔍
01/17/2023 +1828 days 🔍



Advisory: Bug 22375
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-17426 (🔍)


Created: 12/05/2017 09:48 PM
Updated: 01/17/2023 08:16 AM
Changes: 12/05/2017 09:48 PM (73), 12/12/2019 09:40 AM (4), 01/17/2023 08:16 AM (4)
Complete: 🔍


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