Red Hat

CVE-2026-127099: A flaw was found in SSSD's conversion of X.509 certificate RSA public keys to SSH keys. Missing size checks before copying RSA components into fixed-size stack

CVE-2026-127099 Nov 12, 2026 Source: Vendor

A flaw was found in SSSD's conversion of X.509 certificate RSA public keys to SSH keys. Missing size checks before copying RSA components into fixed-size stack buffers can cause a stack buffer overflow. An attacker able to supply a certificate with oversized RSA components that passes the configured certificate checks can cause denial of service and corrupt SSH responder memory.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-127099

Are you credited here? Sign in to claim your line. It is yours immediately, with no review queue. The name the vendor printed stays next to your handle for anyone to check against the advisory above, and any member who thinks a claim is wrong can refute it.

Credited

1 line

Showing 1–1 of 1

CVE-2026-127099 BR2026-0000-047898 unclaimed

Credited as Red Hat would like to thank Priyank Nigam (Microsoft Cloud Security) for reporting this issue