Bug 2459853 (CVE-2026-5450) - CVE-2026-5450 glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width
Summary: CVE-2026-5450 glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format...
Keywords:
Status: NEW
Alias: CVE-2026-5450
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2464554
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-20 21:01 UTC by OSIDB Bzimport
Modified: 2026-05-01 18:31 UTC (History)
7 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-20 21:01:58 UTC 
Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.
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