CVE-2026-63824CWE-787

CVE-2026-63824

High · published July 19, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
2.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00130 · 2.4th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-07-19T16:16Z
Affected products (7)
ProductVersionsFixed in
linux/linux_kernel≥ 4.20, < 5.10.2605.10.260
linux/linux_kernel≥ 5.11, < 5.15.2115.15.211
linux/linux_kernel≥ 5.16, < 6.1.1776.1.177
linux/linux_kernel≥ 6.2, < 6.6.1446.6.144
linux/linux_kernel≥ 6.7, < 6.12.956.12.95
linux/linux_kernel≥ 6.13, < 6.18.386.18.38
linux/linux_kernel≥ 6.19, < 7.1.37.1.3
References (8)
EPSS history
Timeline
  • 19 JUL 12:02Z
    KEYS: fix overflow in keyctl_pkey_params_get_2()
    cvelistv5