wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler The firmware-controlled num_msg field (u8, 0-255) drives the loop in ath6kl_wmi_tx_complete_event_rx() without validation against the buffer length. This allows out-of-bounds reads of up to 1020 bytes past the WMI event buffer when the firmware sends an inflated num_msg. Add a check that the buffer is large enough to hold the fixed struct and the num_msg variable-length entries.

Timeline

1. Aug 10, 2026, 12:03 PM UTCCVE published
2. Oct 16, 2026, 3:47 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 19, 2026, 9:09 PM UTCRecord last updated

Affected versions

• Linux Linux

  From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 5297299c3fa6133275db0be99d69cd759b6cbfe9; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 35196a07603f8c94a4943093bc26d5b5826285f8; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 0e0fc04af9b443c6b425f00fb604ff599bc80d1d; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 69ac7ba3a3df6654e7daa82674575a8c4a1a63ea; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 289edc3c71344b89e6522891147cfb8f61b088bb; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in eb636fbc443149b3501c3f97e26225ddcb314a0f; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in c38b0d5c661951b5dd082bdf31f8a57a0ce6e540; From bdcd81707973cf8aa9305337166f8ee842a050d4 · fixed in 3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495

• Linux Linux

  3.2

• KernelLinux

  From 3.2.0 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 8