CVE-2026-48863
Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-121 |
| Vendor | opensuse |
| Product | libsolv |
| Published | Jul 16, 2026 |
| Last Updated | Jul 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
OpenSUSE / libsolv
0.6.4 < 0.7.38
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Hardened Images
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat Satellite 6
All versions affected Red Hat / Red Hat Update Infrastructure 4 for Cloud Providers
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-48863 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2460975 github.com: https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json
Credits
This issue was discovered by AISLE Research and AISLE in partnership with Red Hat.