What’s Vulnerable › Vulnerabilities

CVE-2026-88840: Busybox: busybox: tls ssl_server reads one byte out of bounds when parsing truncated clienthello

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-09-26
• Weakness: CWE-125

Description

BusyBox TLS get_client_hello() reads past the end of the input buffer when parsing a truncated ClientHello message.

Affected products

• Red Hat Hardened Images: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-88840
• https://bugzilla.redhat.com/show_bug.cgi?id=2531354

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