CVE-2026-63824 (CVSS 7.8)

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3 https://git.kernel.org/stable/c/5165f1cc727f1322456735df212d8e26ec237a8d https://git.kernel.org/stable/c/5966e4e2ba213ab7ad559166152eb4f1f170dd2c https://git.kernel.org/stable/c/622ec2dcd59f21623f2a7ab773c80ceb7d555e3a https://git.kernel.org/stable/c/670fc6a311ed321522b7fff92cf0fc376b4f6e78 https://git.kernel.org/stable/c/b11c1fa32667692a2c0566e10163758e786e430c https://git.kernel.org/stable/c/b1e247338bc71826a2d2def3e0874c34749df69a https://git.kernel.org/stable/c/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b

Frequently Asked Questions

What is CVE-2026-63824? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-63824? +

CVE-2026-63824 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-63824? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-63824