CVE-2026-64314
crypto: chacha20poly1305 - validate poly1305 template argument
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: chacha20poly1305 - validate poly1305 template argument chachapoly_create() still accepts the compatibility poly1305 parameter in the template name, but it assumes the second template argument is always present and immediately passes it to strcmp(). When the argument is missing, crypto_attr_alg_name() returns an error pointer. Check for that before comparing the name so malformed template instantiations fail with an error instead of dereferencing the error pointer in strcmp(). This matches the surrounding Crypto API template pattern where crypto_attr_alg_name() results are validated before string-specific use.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel.
- Apply the crypto: chacha20poly1305 fix.
- Validate crypto_attr_alg_name() results before use.
- Check for missing template arguments.
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-2026-64314.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64314 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-2026-64314
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-2026-64314 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64314 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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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '0016d3c21c6ab60a20be7f565cefb5999f3adeb6', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': 'e74df53b36cdc6b6b9e5488ec883d1d55624737f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '265b861bece38318b8e0fc8fac0643d4ef906d31', 'versionType': 'git'}], 'programFiles': ['crypto/chacha20poly1305.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': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/chacha20poly1305.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '0016d3c21c6ab60a20be7f565cefb5999f3adeb6', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': 'e74df53b36cdc6b6b9e5488ec883d1d55624737f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '265b861bece38318b8e0fc8fac0643d4ef906d31', 'versionType': 'git'}], 'programFiles': ['crypto/chacha20poly1305.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': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/chacha20poly1305.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 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': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '0016d3c21c6ab60a20be7f565cefb5999f3adeb6', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': 'e74df53b36cdc6b6b9e5488ec883d1d55624737f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a298765e28adaea199f722142c10dae7e24dedf8', 'lessThan': '265b861bece38318b8e0fc8fac0643d4ef906d31', 'versionType': 'git'}], 'programFiles': ['crypto/chacha20poly1305.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': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['crypto/chacha20poly1305.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: crypto: chacha20poly1305 - validate poly1305 template argument chachapoly_create() still accepts the compatibility poly1305 parameter in the template name, but it assumes the second template argument is always present and immediately passes it to strcmp(). When the argument is missing, crypto_attr_alg_name() returns an error pointer. Check for that before comparing the name so malformed template instantiations fail with an error instead of dereferencing the error pointer in strcmp(). This matches the surrounding Crypto API template pattern where crypto_attr_alg_name() results are validated before string-specific use. Added Reference https://git.kernel.org/stable/c/0016d3c21c6ab60a20be7f565cefb5999f3adeb6 Added Reference https://git.kernel.org/stable/c/265b861bece38318b8e0fc8fac0643d4ef906d31 Added Reference https://git.kernel.org/stable/c/e74df53b36cdc6b6b9e5488ec883d1d55624737f