CVE-2026-64208

crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

State: Published
Severity: 7.5 High
Published: Jul 24, 2026
Updated: Aug 5, 2026
Reserved: Jul 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

Change the krb5 crypto library to provide facilities to precheck the length of the message about to be decrypted or verified.

Fix AF_RXRPC to make use of this to validate DATA packets secured with RxGK.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a to before 585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ffAffected 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a to before 9217017f4bce53dddb8d547837f1f707045d64adAffected 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a to before 2b50aceafe6606ea52ed42aadd1b4d44a188aadeAffected
LinuxLinux	6.16Affected before 6.16Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.Not affected 7.1 and laterNot affected

References

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