GNU C Library up to 2.40 assert buffer size

Summaryinfo

A vulnerability has been found in GNU C Library up to 2.40 and classified as problematic. Affected by this issue is the function assert. Performing a manipulation results in buffer size. This vulnerability was named CVE-2025-0395. The attack needs to be approached within the local network. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GNU C Library up to 2.40. This affects the function assert. The manipulation with an unknown input leads to a buffer size vulnerability. CWE is classifying the issue as CWE-131. The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow. This is going to have an impact on confidentiality. The summary by CVE is:

When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size aligns to page size.

The advisory is shared at sourceware.org. This vulnerability is uniquely identified as CVE-2025-0395 since 01/11/2025. The exploitability is told to be difficult. The attack needs to be done within the local network. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 214654 (Fedora 41 : glibc (2025-497995b101)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (214654) and CERT Bund (WID-SEC-2025-0172). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Gentoo Linux
• SUSE openSUSE
• Open Source GNU libc
• IBM App Connect Enterprise
• Dell NetWorker
• Dell Avamar
• Red Hat OpenShift
• Broadcom Brocade SANnav
• Broadcom Fabric OS
• Dell PowerProtect Data Domain

Productinfo

Type

• Software Library

Vendor

• GNU

Name

• C Library

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

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Exploitinginfo

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Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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