VDB-366908 · CVE-2026-48863 · EUVD-2026-44842

libsolv EdDSA PGP Signature Verification stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in libsolv. This vulnerability affects unknown code of the component EdDSA PGP Signature Verification. Such manipulation leads to stack-based overflow. This vulnerability is listed as CVE-2026-48863. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in libsolv (the affected version unknown) and classified as problematic. Affected by this issue is an unknown part of the component EdDSA PGP Signature Verification. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is availability. CVE summarizes:

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 advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2026-48863. The exploitation is known to be easy. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 322932 (SUSE SLED15: libsolv-devel / libsolv-tools / libsolv-tools-base / libzypp / etc (SUSE-SU-2026:2575-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (322932) and EUVD (EUVD-2026-44842). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

libsolv

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 322932
Nessus Name: SUSE SLED15: libsolv-devel / libsolv-tools / libsolv-tools-base / libzypp / etc (SUSE-SU-2026:2575-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/28/2026 Advisory disclosed
05/28/2026 +0 days VulDB entry created
08/22/2026 +86 days VulDB entry last update

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2026-48863 (🔒)
GCVE (CVE): GCVE-0-2026-48863
GCVE (VulDB): GCVE-100-366908
EUVD: 🔒

Entryinfo

Created: 05/28/2026 22:58
Updated: 08/22/2026 05:34
Changes: 05/28/2026 22:58 (49), 06/26/2026 17:23 (2), 07/16/2026 04:46 (1), 08/22/2026 05:34 (14)
Complete: 🔍
Cache ID: 216::103