Integer Overflow Vulnerability in GLib's Unicode Case Conversion
CVE-2026-1489

5.4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
27 January 2026

What is CVE-2026-1489?

A flaw exists in GLib due to an integer overflow in its Unicode case conversion functionality, potentially leading to memory corruption. Attackers can exploit this vulnerability by sending specially crafted, excessively large Unicode strings that result in inadequate memory allocation. This can trigger out-of-bounds writes, possibly causing applications that rely on GLib for string handling to crash or behave erratically. The impact of this vulnerability underscores the importance of properly managing memory in software applications.

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References

https://access.redhat.com/security/cve/CVE-2026-1489
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2433348
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank treeplus for reporting this issue.
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