High 7.8Published Jul 19, 2026

CVE-2026-63824KEYS: fix overflow in keyctl_pkey_params_get_2()

Updated under an hour ago (Oct 28, 2026, 7:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 00d60fd3b93219ea854220f0fd264b86398cbc53 before 622ec2dcd59f21623f2a7ab773c80ceb7d555e3a; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before b1e247338bc71826a2d2def3e0874c34749df69a; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before 0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before 5966e4e2ba213ab7ad559166152eb4f1f170dd2c; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before 5165f1cc727f1322456735df212d8e26ec237a8d; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before b11c1fa32667692a2c0566e10163758e786e430c; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before 670fc6a311ed321522b7fff92cf0fc376b4f6e78; from 00d60fd3b93219ea854220f0fd264b86398cbc53 before cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b	CNA record
linux linux_kernel linux:linux_kernel	from 4.20 before 5.10.260; from 5.11 before 5.15.211; from 5.16 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.38; from 6.19 before 7.1.3	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.