wifi: mt76: mt7915: fix double hif2 init on the non-WED path

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: fix double hif2 init on the non-WED path mt7915_pci_init_hif2() was called unconditionally and again inside the WED-inactive branch. The helper increments the global hif_idx, writes the PCIe RECOG_ID register and takes a get_device() reference via mt7915_pci_get_hif2(), while removal only drops one reference. On non-WED dual-hif hardware this double-incremented hif_idx, wrote RECOG_ID twice and leaked a device reference. Only the call inside the WED-inactive branch is correct; drop the unconditional one. hif2 is already initialised to NULL.

Timeline

1. Sep 17, 2026, 4:09 PM UTCCVE published
2. Oct 19, 2026, 9:02 AM UTCRecord last updated

Affected versions

• Linux Linux

  From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in eac18fadc791928379b179e54636494b92f8cf86; From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in 927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6; From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe; From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in 249cbaa1873550689fab136b74982cbba74c4169; From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in 29fbc5256c2d8448f084ff179d2e5092ecd1fc54; From cacdd67812c6df824704ac078f1770188a485ff9 · fixed in 3ae8ad277e2819a281b0e36b55633c8515c16ce7

• Linux Linux

  5.18

• KernelLinux

  From 5.18.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 6