Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service (CVE-2026-48863) | HOL Guard CVE

High · CVSS 7.5CVE-2026-48863

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

Answer in brief

CVE-2026-48863 records a High severity (CVSS 7.5) vulnerability in Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service. The current sources do not mark it as known exploited. The current feed maps OpenSUSE/libsolv (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 16, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Jul 16, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenSUSE/libsolv (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
OpenSUSE/libsolvgeneric	>=0.6.4 <0.7.38	0.7.38

Recommended response

Check inventory. Check lockfiles and deployed manifests for OpenSUSE/libsolv.
Review the reported fix. Update OpenSUSE/libsolv to 0.7.38 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.