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CVE-2026-5450 is a one-byte heap buffer overflow affecting GNU C Library (glibc) versions 2.7 through 2.43. A scanf-family function can write beyond a heap allocation when processing the dynamically allocating %mc character conversion with an explicit field width greater than 1024. The flaw can cause memory corruption in applications that execute the affected parsing operation.
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No public exploit code observed for this vulnerability.
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A one-byte heap buffer overflow in GNU C Library versions 2.7 through 2.43, triggered by scanf-family functions using %mc with an explicit width greater than 1024. The plugin reports a CVSS v3 base score of 9.8 and available exploits. It recommends updating the Google COS sys-libs/glibc package and related packages to version 20198.0.0 or later.
A vulnerability covered by a Rocky Linux 9.6 TuxCare security update, rated with a critical-impact CVSS v3.0 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A remotely exploitable critical-severity vulnerability, per the supplied CVSS v3 vector (network-accessible, no privileges or user interaction required, with high confidentiality, integrity, and availability impact). The notice states that exploits are available and that a patch was published on June 26, 2026.
A critical network-reachable vulnerability affecting the EulerOS 2.11.1 glibc-related package set. The content assigns it CVSS 9.8 and indicates exploit availability, but does not provide the flaw's technical root cause.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.