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.
References6
- access.redhat.com/security/cve/CVE-2026-48863
- bugzilla.redhat.com/show_bug.cgi?id=2460975
- github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b…
- access.redhat.com/security/cve/CVE-2026-48863
- bugzilla.redhat.com/show_bug.cgi?id=2460975
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 58 · as of 15 November 2026
- CWE
- CWE-121
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.