CVE-2026-48863

HIGH

Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service

Title source: cna

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.

References (4)

Core 4

Core References

Vendor Advisory

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json

Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-48863

Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat

RHBZ#2460975

https://bugzilla.redhat.com/show_bug.cgi?id=2460975

https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592

View Patch ZIP pw:eip

Scores

CVSS v3 7.5

EPSS 0.0047

EPSS Percentile 38.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-121

Status published

Products (9)

OpenSUSE/libsolv 0.6.4 - 0.7.38

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat Hardened Images

Red Hat/Red Hat OpenShift Container Platform 4

Red Hat/Red Hat Satellite 6

Red Hat/Red Hat Update Infrastructure 4 for Cloud Providers

Published Jul 16, 2026

Tracked Since Jul 16, 2026