Is CVE-2026-48863 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-48863?

CVE-2026-48863 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-48863

Description

A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows.