Buffer overflow in openSUSE Libsolv

CVE-2026-48863

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.

Vulnerability class: Buffer Overflow

EPSS: 0.008 (54.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-48863?
CVE-2026-48863 is a high-severity vulnerability in openSUSE Libsolv, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-07-16.
How severe is CVE-2026-48863?
High severity. CVSS v3 base score is 7.5 out of 10.