CVE-2026-64208
crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks
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.
INFO
Published Date :
July 24, 2026, 4:16 p.m.
Last Modified :
July 24, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64208
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to include crypto library fixes.
- Ensure AF_RXRPC uses updated length validation for DATA packets.
- Verify pre-decrypt and pre-verify checks are correctly implemented.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64208.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64208 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64208
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64208 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64208 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a', 'lessThan': '585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff', 'versionType': 'git'}, {'status': 'affected', 'version': '9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a', 'lessThan': '9217017f4bce53dddb8d547837f1f707045d64ad', 'versionType': 'git'}, {'status': 'affected', 'version': '9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a', 'lessThan': '2b50aceafe6606ea52ed42aadd1b4d44a188aade', 'versionType': 'git'}], 'programFiles': ['Documentation/crypto/krb5.rst', 'crypto/krb5/krb5_api.c', 'include/crypto/krb5.h', 'include/trace/events/rxrpc.h', 'net/rxrpc/rxgk.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['Documentation/crypto/krb5.rst', 'crypto/krb5/krb5_api.c', 'include/crypto/krb5.h', 'include/trace/events/rxrpc.h', 'net/rxrpc/rxgk.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/2b50aceafe6606ea52ed42aadd1b4d44a188aade Added Reference https://git.kernel.org/stable/c/585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff Added Reference https://git.kernel.org/stable/c/9217017f4bce53dddb8d547837f1f707045d64ad