CVE-2026-63824
HIGH severity · CVSS 7.8 · Out-of-bounds write
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3Patch
- https://git.kernel.org/stable/c/5165f1cc727f1322456735df212d8e26ec237a8dPatch
- https://git.kernel.org/stable/c/5966e4e2ba213ab7ad559166152eb4f1f170dd2cPatch
- https://git.kernel.org/stable/c/622ec2dcd59f21623f2a7ab773c80ceb7d555e3aPatch
- https://git.kernel.org/stable/c/670fc6a311ed321522b7fff92cf0fc376b4f6e78Patch
- https://git.kernel.org/stable/c/b11c1fa32667692a2c0566e10163758e786e430cPatch
- https://git.kernel.org/stable/c/b1e247338bc71826a2d2def3e0874c34749df69aPatch
- https://git.kernel.org/stable/c/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0bPatch