Bug 2507259 (CVE-2026-64314)

Summary: CVE-2026-64314 kernel: crypto: chacha20poly1305 - validate poly1305 template argument
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's `chacha20poly1305` cryptographic module. This vulnerability occurs because the `chachapoly_create()` function does not properly validate a `poly1305` template argument. When this argument is missing, an error pointer is incorrectly passed to a string comparison function, leading to a dereference of the error pointer. This can result in a system crash, causing a Denial of Service (DoS) for affected systems.
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Description OSIDB Bzimport 2026-07-25 10:13:17 UTC 
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.
Comment 1 TEJ RATHI 2026-07-27 07:42:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072509-CVE-2026-64314-89f3@gregkh/T