Medium5.0Red Hat & Ubuntu Linux
Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width
CVE-2026-5450 Published Apr 20, 2026
CVE-2026-5450
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width. Red Hat rates this moderate (CVSS 5). Weakness: CWE-131. Affected package(s): glibc, insights-proxy/insights-proxy-container-rhel9:1782890503, glibc-main. Resolved in Red Hat advisory RHSA-2026:33170 — update the affected packages (`sudo dnf update`).
Affected versions
- glibc-0:2.39-126.el10_2
- insights-proxy/insights-proxy-container-rhel9:1782890503
- glibc-0:2.17-326.el7_9.6
- glibc-0:2.34-272.el9_8
- glibc-0:2.34-168.el9_6.25
- glibc-0:2.28-225.el8_8.17
- glibc-0:2.39-46.el10_0.5
- glibc-0:2.28-189.13.el8_6
- glibc-0:2.34-100.el9_4.13
- glibc-0:2.34-60.el9_2.20
- glibc-0:2.28-251.el8_10.38
- glibc-main-2.42-12.hum1
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:33170
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:33170 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.