Takashi Sakamoto

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to the version that includes the fix for the uninitialized flag for AV/C deferred transaction **Description** The issue is related to an uninitialized flag for AV/C deferred transactions in the Linux kernel. The problem was introduced when support for deferred transactions was added. The UBSAN reports an invalid load due to the uninitialized `deferrable` flag for non-control/notify AV/C transactions. The bug does not affect non-control/notify AV/C transactions since the flag only affects AV/C responses with an INTERIM status, which is not used in the AV/C general specification. **Recommendations** For Linux kernel versions prior to the fixed version, consider applying the patch that fixes the uninitialized flag for AV/C deferred transactions to resolve the issue. As a temporary workaround, there is no specific recommendation provided, but ensuring that the kernel is updated to the latest version when available would be a general best practice. At the moment, there is no information about a newer version that contains a fix for this vulnerability.