CVE-2026-63824 Details
Description
In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctl_pkey_params_get_2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided. Fix the bug by allocating internal output with the size of the maximum length of the cryptographic primitive instead of caller provided size.
A buffer overflow vulnerability has been identified in the Linux kernel's handling of asymmetric keys. This issue arises in the 'keyctl_pkey_params_get_2' function, where the internal output buffer length is incorrectly calculated. As a result, a buffer overflow can occur if a buffer that is too small is provided. The vulnerability affects several versions of the Linux kernel, specifically in the stable tree, and has been present since version 4.20.
Users can upgrade to the latest version of the Linux kernel stable release to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | CVE Modified | kernel.org |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |