CVE-2026-90354 PUBLISHED

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

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to eac18fadc791928379b179e54636494b92f8cf86 (excl.)
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to 927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6 (excl.)
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe (excl.)
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to 249cbaa1873550689fab136b74982cbba74c4169 (excl.)
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to 29fbc5256c2d8448f084ff179d2e5092ecd1fc54 (excl.)
  • affected from cacdd67812c6df824704ac078f1770188a485ff9 to 3ae8ad277e2819a281b0e36b55633c8515c16ce7 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.18 is affected
  • unaffected from 0 to 5.18 (excl.)
  • unaffected from 6.1.188 to 6.1.* (incl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References