CVE-2026-90378 PUBLISHED

wifi: mt76: mt792x: Fix memory leak in SDIO TX 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: mt792x: Fix memory leak in SDIO TX path

When tx_prepare_skb() returns an error in the SDIO TX path, the skb is not freed, leading to a memory leak. This can occur when zero-length frames (such as WNM NULL frames) are dropped to prevent potential hardware TX hangs.

Fix this by properly releasing the skb with ieee80211_tx_status_ext() when tx_prepare_skb() fails.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to b64d196280aff8494ba6fb387e37b18479c99b83 (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to 9ef1351209d42b7d96604f2a13d7ea8215a24e07 (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to c2c7f16f2c62f79f7c381e500afa7123580742a5 (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to 6a8000c76dc34490a2bb321ad1a5f882a2ccab7c (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to ddf6a17d8e3d0dbb841c13c10d7c1340a138a80d (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to 6a342db7a6502bc6781579145e05d4d4731786ab (excl.)
  • affected from b747fa343817fd322b4463dda99d28fc51e19c52 to 808f2767d4217a5b96f674288573b9b89d432eed (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.12 is affected
  • unaffected from 0 to 5.12 (excl.)
  • 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