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Description

A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.

PUBLISHED Reserved 2026-01-27 | Published 2026-01-27 | Updated 2026-01-27 | Assigner redhat




MEDIUM: 4.2CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

Problem types

Out-of-bounds Write

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Timeline

2026-01-27:Reported to Red Hat.
2026-01-27:Made public.

Credits

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

References

access.redhat.com/security/cve/CVE-2026-1484 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2433259 (RHBZ#2433259) issue-tracking

cve.org (CVE-2026-1484)

nvd.nist.gov (CVE-2026-1484)

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