Bug 2491878 (CVE-2026-57053) - CVE-2026-57053 libidn: GNU libidn: Out-of-bounds read in ToUnicode APIs
Summary: CVE-2026-57053 libidn: GNU libidn: Out-of-bounds read in ToUnicode APIs
Keywords:
Status: NEW
Alias: CVE-2026-57053
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2509780 2509778 2509779 2509781
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-23 18:02 UTC by OSIDB Bzimport
Modified: 2026-07-31 14:11 UTC (History)
10 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-23 18:02:35 UTC 
GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.
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