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wifi: mac8021: fix possible oob access in ieee80211_get_rate_duration

Published Oct 21, 2024

Description

Fix possible out-of-bound access in ieee80211_get_rate_duration routine as reported by the following UBSAN report:

UBSAN: array-index-out-of-bounds in net/mac80211/airtime.c:455:47 index 15 is out of range for type 'u16 [12]' CPU: 2 PID: 217 Comm: kworker/u32:10 Not tainted 6.1.0-060100rc3-generic Hardware name: Acer Aspire TC-281/Aspire TC-281, BIOS R01-A2 07/18/2017 Workqueue: mt76 mt76u_tx_status_data [mt76_usb] Call Trace: <TASK> show_stack+0x4e/0x61 dump_stack_lvl+0x4a/0x6f dump_stack+0x10/0x18 ubsan_epilogue+0x9/0x43 __ubsan_handle_out_of_bounds.cold+0x42/0x47 ieee80211_get_rate_duration.constprop.0+0x22f/0x2a0 [mac80211] ? ieee80211_tx_status_ext+0x32e/0x640 [mac80211] ieee80211_calc_rx_airtime+0xda/0x120 [mac80211] ieee80211_calc_tx_airtime+0xb4/0x100 [mac80211] mt76x02_send_tx_status+0x266/0x480 [mt76x02_lib] mt76x02_tx_status_data+0x52/0x80 [mt76x02_lib] mt76u_tx_status_data+0x67/0xd0 [mt76_usb] process_one_work+0x225/0x400 worker_thread+0x50/0x3e0 ? process_one_work+0x400/0x400 kthread+0xe9/0x110 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30

Affected products

Remediation

Red Hat statement

This issue is considered to be a moderate impact flaw, as the exploitation in this will not cause an Intigrity (I:L) threat with the available usecase.

Weaknesses (1)

References (10)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner Linux
Published Oct 21, 2024
Updated Aug 5, 2026
Reserved Aug 22, 2024
CISA Vulnrichment
Updated Oct 22, 2024
NVD
Status Modified
Modified Aug 4, 2026
Red Hat
Severity Moderate
Public date Oct 21, 2024
ENISA EUVD
Assigner Linux
Published Oct 21, 2024
Updated Aug 5, 2026
Exploited since n/a
EUVD-2022-53906