GNU SASL up to 2.2.2 DIGEST-MD5 getsubopt.c null pointer dereference

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.
6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GNU SASL up to 2.2.2. Impacted is an unknown function in the library lib/digest-md5/getsubopt.c of the component DIGEST-MD5 Handler. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2026-48829. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GNU SASL up to 2.2.2 and classified as problematic. Affected by this vulnerability is an unknown functionality in the library lib/digest-md5/getsubopt.c of the component DIGEST-MD5 Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In GNU SASL before 2.2.3, DIGEST-MD5 has a NULL pointer dereference affecting both clients and servers, via a known token with no accompanying = character. This occurs in lib/digest-md5/getsubopt.c.

It is possible to read the advisory at lists.gnu.org. This vulnerability is known as CVE-2026-48829 since 05/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316646 (Linux Distros Unpatched Vulnerability : CVE-2026-48829), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.2.3 eliminates this vulnerability. Applying the patch da9b5ae2962b014879e4a406c3b38f25aa70e97a is able to eliminate this problem. The bugfix is ready for download at codeberg.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-4912) and Tenable (316646). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 316646
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-48829

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SASL 2.2.3
Patch: da9b5ae2962b014879e4a406c3b38f25aa70e97a

Timelineinfo

05/24/2026 Advisory disclosed
05/24/2026 +0 days CVE reserved
05/24/2026 +0 days VulDB entry created
05/26/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: lists.gnu.org
Status: Confirmed

CVE: CVE-2026-48829 (🔒)
GCVE (CVE): GCVE-0-2026-48829
GCVE (VulDB): GCVE-100-365359
CNNVD: CNNVD-202605-4912 - GNU SASL 代码问题漏洞

Entryinfo

Created: 05/24/2026 08:02
Updated: 05/26/2026 02:07
Changes: 05/24/2026 08:02 (67), 05/25/2026 18:59 (6), 05/26/2026 02:07 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!