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Vulnerabilities CVE-2026-13757

CVE-2026-13757

Medium
Open
TLP:CLEAR

P11-kit: stack exhaustion via unbounded recursion in rpc attribute parsing

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Description

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.

Details

CVSS Score
6.2
EPSS Score
0.14%

3.5th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jun 29, 2026
Last Modified
Aug 12, 2026
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