Skip to main content

Severity by source

Vendor (redhat) PRIMARY
6.2 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.2 MEDIUM

Unix domain socket is locally accessible without p11-kit credentials; pure stack-exhaustion crash yields only availability impact with no data disclosure or code execution.

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.2 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jun 29, 2026 - 19:23 vuln.today
CVE Published
Jun 29, 2026 - 18:44 nvd
MEDIUM 6.2

DescriptionCVE.org

A flaw was found in p11-kit. The RPC message attribute parsing functions p11_rpc_message_get_attribute() and p11_rpc_message_get_attribute_array_value() form a mutually-recursive call chain with no recursion depth limit when processing nested CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE attributes. An unauthenticated attacker with local access to the p11-kit RPC Unix domain socket can send a specially crafted request with deeply nested template attributes, causing stack exhaustion and crashing the p11-kit server process and its dependent services.

AnalysisAI

Stack exhaustion in p11-kit's RPC server crashes the daemon and any dependent cryptographic services on affected Red Hat systems. The vulnerability exists in the PKCS#11 RPC message parsing layer, where two attribute-handling functions form a mutually-recursive call chain with no depth limit when processing nested CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE attributes - allowing any local user or process with socket access to crash the server by sending a single crafted request. No public exploit or active exploitation has been identified at time of analysis, and impact is limited to availability (denial of service) with no confidentiality or integrity consequence.

Technical ContextAI

p11-kit is a foundational PKCS#11 toolkit that provides a standardized interface for cryptographic tokens such as hardware security modules (HSMs) and smart cards. It exposes an RPC server over a Unix domain socket so that client processes can interact with PKCS#11 providers. The flaw resides in the RPC message parsing functions p11_rpc_message_get_attribute() and p11_rpc_message_get_attribute_array_value(), which handle PKCS#11 attribute structures. PKCS#11 permits meta-attributes - CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE - that themselves embed arrays of further attributes, enabling arbitrary nesting in protocol messages. The two parsing functions invoke each other recursively to process these nested structures without any recursion depth guard, a classic CWE-674 (Uncontrolled Recursion) pattern. A sufficiently deep nesting in an attacker-crafted message overflows the thread stack, causing a process crash. Affected CPE strings span Red Hat Enterprise Linux 6 through 10, Red Hat Hardened Images, and Red Hat OpenShift Container Platform 4.

RemediationAI

Apply the Red Hat-supplied RPM update for p11-kit once released, using standard package management (dnf update p11-kit or yum update p11-kit depending on RHEL version); monitor https://access.redhat.com/security/cve/CVE-2026-13757 for confirmed patch availability, as no fixed version number is confirmed in the data available at time of analysis. As an interim compensating control, restrict filesystem permissions on the p11-kit Unix domain socket (typically under /run/p11-kit/) to limit access to only the specific users and service accounts that legitimately require it, effectively converting PR:N to a higher privilege bar in practice - note this may break applications relying on p11-kit for PKCS#11 operations, so test against dependent services before deploying. On OpenShift Container Platform 4, apply Security Context Constraints (SCCs) to prevent untrusted pods from accessing the host socket path. Restarting the p11-kit server process after a crash is sufficient for recovery, but does not prevent re-exploitation.

CVE-2026-18663 MEDIUM
5.9 Aug 12

Heap corruption via double-free in 389-ds-base's LDAP control parsing allows an unauthenticated remote attacker to crash

CVE-2026-4631 CRITICAL POC
9.8 Apr 07

Remote code execution in Cockpit's web interface allows unauthenticated attackers to execute arbitrary commands on the h

CVE-2026-4480 CRITICAL POC
9.0 May 26

Remote code execution in Samba's printing subsystem allows remote attackers to inject arbitrary shell commands via craft

CVE-2026-18922 CRITICAL
9.8 Sep 07

Authentication bypass in 389 Directory Server (shipped as Red Hat Directory Server 11-13 and within RHEL 6-10) lets remo

CVE-2026-14544 CRITICAL
9.8 Jul 03

Remote code execution and privilege escalation in HPLIP (HP Linux Imaging and Printing) affects the hpcups print filter

CVE-2026-76578 CRITICAL
9.8 Sep 07

Unauthenticated privilege escalation in FreeIPA (Red Hat Identity Management) allows a remote attacker to gain genuine a

CVE-2026-5121 HIGH
7.5 Mar 30

Remote code execution in libarchive on 32-bit systems allows unauthenticated attackers to execute arbitrary code via spe

CVE-2026-28369 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow (the embedded web server underpinning JBoss EAP, Red Hat Data Grid, and Apache Camel

CVE-2026-28368 CRITICAL
9.1 Mar 27

HTTP request smuggling in Red Hat Undertow allows remote unauthenticated attackers to bypass front-end security controls

CVE-2026-33845 CRITICAL
9.1 Apr 30

Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an intege

CVE-2026-28367 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow allows remote unauthenticated attackers to send `\r\r\r` as a header block terminator

CVE-2026-16526 HIGH
8.8 Jul 30

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SLES15-SP5-CHOST-BYOS-SAP-CCloud Affected
SLES15-SP6-CHOST-BYOS Affected
SLES15-SP6-CHOST-BYOS-Aliyun Affected
SLES15-SP6-CHOST-BYOS-Azure Affected
SLES15-SP6-CHOST-BYOS-EC2 Affected

Share

CVE-2026-13757 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy