Heap Corruption Vulnerability in GNU C Library by the Free Software Foundation
CVE-2026-0861

8.4HIGH

Key Information:

Vendor

The Gnu C Library

Status
Glibc
Vendor
CVE Published:
14 January 2026

What is CVE-2026-0861?

The vulnerability arises from passing a value larger than expected to the memalign suite of functions in the GNU C Library versions 2.30 to 2.42. This can lead to an integer overflow, potentially allowing for heap corruption. Such exploitation may enable adversaries to manipulate memory allocation mechanisms, leading to security breaches or system stability issues.

Affected Version(s)

glibc 2.30 <= 2.42

References

https://sourceware.org/bugzilla/show_bug.cgi?id=33796
https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=ad...

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Igor Morgenstern, Aisle Research
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