PT-2026-47378 · Linux · Linux

Published 2026-06-08 · Updated 2026-06-08 · CVE-2026-46307

Mitre

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath5k: do not access array OOB

Vincent reports:

The ath5k driver seems to do an array-index-out-of-bounds access as shown by the UBSAN kernel message: UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath5k/base.c:1741:20 index 4 is out of range for type 'ieee80211 tx rate [4]' ... Call Trace: dump stack lvl+0x5d/0x80 ubsan epilogue+0x5/0x2b ubsan handle out of bounds.cold+0x46/0x4b ath5k tasklet tx+0x4e0/0x560 [ath5k] tasklet action common+0xb5/0x1c0

It is real. 'ts->ts final idx' can be 3 on 5212, so: info->status.rates[ts->ts final idx + 1].idx = -1; with the array defined as: struct ieee80211 tx rate rates[IEEE80211 TX MAX RATES]; while the size is: #define IEEE80211 TX MAX RATES 4 is indeed bogus.

Set this 'idx = -1' sentinel only if the array index is less than the array size. As mac80211 will not look at rates beyond the size (IEEE80211 TX MAX RATES).

Note: The effect of the OOB write is negligible. It just overwrites the next member of info->status, i.e. ack signal.

Related Identifiers

CVE-2026-46307

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-46307 · Security Note
• https://git.kernel.org/stable/c/83226c71af53fb9b3cad40cb9a9a79f36d68c020 · Note
• https://git.kernel.org/stable/c/744c19e266b0d2628c5951439195dcef27eadacf · Note
• https://git.kernel.org/stable/c/568173ad9bd0b46cc6cd937dea8791e9b5eefa57 · Note
• https://git.kernel.org/stable/c/d6869537013b1f21b292342752d97868b79b5934 · Note
• https://git.kernel.org/stable/c/9dd6aae4bc7bfa11088d928670a3315eae542769 · Note
• https://git.kernel.org/stable/c/d748603f12baff112caa3ab7d39f50100f010dbd · Note
• https://git.kernel.org/stable/c/e9f1081bc775146156def0dbc821b92f35d56afb · Note
• https://git.kernel.org/stable/c/ecb1c163166759dec004c1fdb9709b8a5992fc8e · Note