Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2026-48863
- https://bugzilla.redhat.com/show_bug.cgi?id=2460975
- https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff
- https://access.redhat.com/security/cve/CVE-2026-48863
- https://bugzilla.redhat.com/show_bug.cgi?id=2460975
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json
FAQ
What is CVE-2026-48863?
CVE-2026-48863 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 rem...
How severe is CVE-2026-48863?
CVE-2026-48863 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48863?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.