CVE-2025-39784

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix link speed calculation on retrain failure When pciefailedlinkretrain fails to retrain, it tries to revert to the previous link speed. However it calculates that speed from the Link Control 2 register without masking out...

CVE-2025-39784 PCI: Fix link speed calculation on retrain failure

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix link speed calculation on retrain failure When pciefailedlinkretrain fails to retrain, it tries to revert to the previous link speed. However it calculates that speed from the Link Control 2 register without masking out...

CVE-2025-39784

CVE-2025-39784 is a Linux kernel PCIe issue resolved by masking non-speed bits in PCIE_LNKCTL2_TLS2SPEED() (and PCIE_LNKCAP_SLS2SPEED()) when retraining a PCIe link. The bug caused incorrect speed values to be interpreted from the Link Control 2 register, producing PCI_SPEED_UNKNOWN (0xff) and tr...