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CVE-2026-90354

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected cacdd67812c6df824704ac078f1770188a485ff9 before eac18fadc791928379b179e54636494b92f8cf86; affected cacdd67812c6df824704ac078f1770188a485ff9 before 927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6; affected cacdd67812c6df824704ac078f1770188a485ff9 before bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe; affected cacdd67812c6df824704ac078f1770188a485ff9 before 249cbaa1873550689fab136b74982cbba74c4169; affected cacdd67812c6df824704ac078f1770188a485ff9 before 29fbc5256c2d8448f084ff179d2e5092ecd1fc54; affected cacdd67812c6df824704ac078f1770188a485ff9 before 3ae8ad277e2819a281b0e36b55633c8515c16ce7
Linux / Linuxaffected 5.18; unaffected 0 before 5.18; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References