VDB-426598 · CVE-2026-104591 · GCVE-0-2026-104591

libosmocore up to 1.14.1 src/gsm/iuup.c osmo_iuup_compute_payload_crc buffer 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.
4.3	$0-$5k	1.95

Summaryinfo

A vulnerability was found in libosmocore up to 1.14.1 and classified as problematic. The impacted element is the function osmo_iuup_compute_payload_crc of the file src/gsm/iuup.c. Executing a manipulation can lead to buffer overflow. This vulnerability appears as CVE-2026-104591. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in libosmocore up to 1.14.1. It has been declared as problematic. This vulnerability affects the function osmo_iuup_compute_payload_crc of the file src/gsm/iuup.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

libosmocore through 1.14.1 contains a buffer overflow in osmo_iuup_compute_payload_crc() in src/gsm/iuup.c. This allows a remote attacker to cause a denial of service.

The advisory is available at osmocom.org. This vulnerability was named CVE-2026-104591 since 10/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/26/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

libosmocore

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/02/2026 CVE reserved
10/26/2026 +24 days Advisory disclosed
10/26/2026 +0 days VulDB entry created
10/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: osmocom.org
Status: Confirmed

CVE: CVE-2026-104591 (🔒)
GCVE (CVE): GCVE-0-2026-104591
GCVE (VulDB): GCVE-100-426598

Entryinfo

Created: 10/26/2026 20:10
Changes: 10/26/2026 20:10 (52)
Complete: 🔍
Cache ID: 216::103