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In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: validate reply message payload bounds against transfer length nvmet_auth_reply() accesses the variable-length rval[] array using attacker-controlled hl (hash length) and dhvlen (DH value length) fields without verifying they fit within the allocated buffer of tl bytes. A malicious NVMe-oF initiator can craft a DHCHAP_REPLY message with a small transfer length but large hl/dhvlen values, causing out-of-bounds heap reads when the target processes the DH public key (rval + 2*hl) or performs the host response memcmp. With DH authentication configured, the OOB pointer is passed directly to sg_init_one() and read by crypto_kpp_compute_shared_secret(), reaching up to 526 bytes past the buffer. This is exploitable pre-authentication. Add bounds validation ensuring sizeof(*data) + 2*hl + dhvlen <= tl before any access to the variable-length fields. Discovered by Atuin - Automated Vulnerability Discovery Engine.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2026072511-CVE-2026-64319-0860@gregkh/T
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:64775 https://access.redhat.com/errata/RHSA-2026:64775
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:64808 https://access.redhat.com/errata/RHSA-2026:64808