CVE-2026-5450CRITICAL 9.8EPSS p35.8%

CVE-2026-5450CVE-2026-5450

Description

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.45% probability of exploitation · percentile 35.8% · 2026-06-18T12:00:27Z
Published2026-04-20
Last modified2026-04-23

Underlying weaknesses· 2

CWE-122CWE-787

References

  1. https://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#u
  2. https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450
  3. https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450

2

TypeTargetConfidenceTier
WeaknessHeap-based Buffer Overflowcwe-1220%live
WeaknessOut-of-bounds Writecwe-7870%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.