CVE-2026-90372 PUBLISHED

wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss

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: avoid nss underflow in mt7915_mcu_get_sta_nss

If a peer's VHT/HE MCS map has no supported spatial stream (all fields 0x3), the loop exits with nss == 0 and the function returned (u8)-1 (255), which was then written into the firmware sta_rec_bf beamforming fields. Clamp the result to 0.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 2801477c36a19be4f549fe60e54995f03b0ea7b9 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 38f4d6323bcd65e41a691432eddabd2b03acdeee (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 25f753f7f620955a8a51e63e445d8b9076c51396 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 85bd46ab7674b6d357f9a14791352c65fb09eee9 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to ecfd1a07e78c31d81322fb2d81dc468081cc3004 (excl.)
  • affected from 89029a85482cbcf68026a89fc974e8f6898d6b37 to 4a2f4be532e3ea4e2b536e411793a05aaa51af25 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.8 is affected
  • unaffected from 0 to 5.8 (excl.)
  • unaffected from 5.10.270 to 5.10.* (incl.)
  • unaffected from 5.15.221 to 5.15.* (incl.)
  • 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