Cedric Wassenaar

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to the version that includes the fix for the dma queue left shift overflow issue **Description** A left shift overflow issue has been identified in the Linux kernel when the queue number is greater than 4, due to a 32-bit integer variable. This results in a wrong mask calculation for MTL RXQ DMA MAP1. If CONFIG UBSAN is enabled, the kernel dumps a warning indicating a shift-out-of-bounds error. The issue is related to the `dwmac4 map mtl dma` function and the `stmmac mtl configuration` function. **Recommendations** For Linux kernel versions prior to the fixed version, consider applying the patch that fixes the dma queue left shift overflow issue to resolve the problem. At the moment, there is no information about a newer version that contains a fix for this vulnerability.