Is CVE-2026-13757 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13757 being exploited in the wild.

How severe is CVE-2026-13757?

Medium severity, with a CVSS score of 6.2, published 29 June 2026.

Which products and versions are affected?

p11-kit p11-kit Introduced in commit 6529b540 (Feb 2024); Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 9; Red Hat Red Hat Enterprise Linux 8; and 3 more.

Is there a fix for CVE-2026-13757?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-13757 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-13757?

Check whether you run Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13757: p11-kit stack exhaustion via uncontrolled recursion in RPC attribute parsing

CVE-2026-13757 · Severity: medium · CVSS 6.2 · Published 2026-06-29

A security flaw in p11-kit, a tool used to manage security modules like smart cards and encryption keys, can allow a local user to crash the service. By sending a specially crafted request, an attacker can force the system to run out of memory and stop responding. This results in a denial of service for critical applications that rely on p11-kit, such as web browsers, VPN clients, and SSH agents.

Technologies: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4. Vendors: Red Hat.

Quick answers

Is CVE-2026-13757 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13757 being exploited in the wild.
How severe is CVE-2026-13757?: Medium severity, with a CVSS score of 6.2, published 29 June 2026.
Which products and versions are affected?: p11-kit p11-kit Introduced in commit 6529b540 (Feb 2024); Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 9; Red Hat Red Hat Enterprise Linux 8; and 3 more.
Is there a fix for CVE-2026-13757?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-13757 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-13757?: Check whether you run Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A flaw exists in p11-kit's RPC message attribute parsing functions, specifically p11_rpc_message_get_attribute() and p11_rpc_message_get_attribute_array_value(). These functions form a mutually-recursive call chain without a recursion depth limit when processing nested CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE attributes. An unauthenticated local attacker with access to the p11-kit RPC Unix domain socket can send a crafted C_CreateObject request with deeply nested template attributes. This triggers stack exhaustion, leading to a SIGSEGV/SIGBUS crash of the p11-kit server process and any dependent services. The vulnerability was introduced in commit 6529b540.

Affected products

p11-kit p11-kit Introduced in commit 6529b540 (Feb 2024)
Red Hat Red Hat Enterprise Linux 10
Red Hat Red Hat Enterprise Linux 9
Red Hat Red Hat Enterprise Linux 8
Red Hat Red Hat Enterprise Linux 7
Red Hat Red Hat Enterprise Linux 6
Red Hat Red Hat OpenShift Container Platform 4

Timeline

2026-06-29: disclosed
2026-06-29: advisory

References

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