CVE-2026-48863CWE-121

CVE-2026-48863

High · published July 16, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
56.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00820 · 56.8th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-07-16T05:16Z
References (6)
https://access.redhat.com/security/cve/CVE-2026-48863 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2460975 · [email protected]https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592 · [email protected]https://access.redhat.com/security/cve/CVE-2026-48863 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2460975 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 16 JUL 00:46Z
    Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
    cvelistv5