Vulnerability CVE-2023-52832

Vulnerability CVE-2023-52832

Published: 2024-05-21

Description:

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

wifi: mac80211: don't return unset power in ieee80211_get_tx_power()

We can get a UBSAN warning if ieee80211_get_tx_power() returns the
INT_MIN value mac80211 internally uses for "unset power level".

UBSAN: signed-integer-overflow in net/wireless/nl80211.c:3816:5
-2147483648 * 100 cannot be represented in type 'int'
CPU: 0 PID: 20433 Comm: insmod Tainted: G WC OE
Call Trace:
dump_stack+0x74/0x92
ubsan_epilogue+0x9/0x50
handle_overflow+0x8d/0xd0
__ubsan_handle_mul_overflow+0xe/0x10
nl80211_send_iface+0x688/0x6b0 [cfg80211]
[...]
cfg80211_register_wdev+0x78/0xb0 [cfg80211]
cfg80211_netdev_notifier_call+0x200/0x620 [cfg80211]
[...]
ieee80211_if_add+0x60e/0x8f0 [mac80211]
ieee80211_register_hw+0xda5/0x1170 [mac80211]

In this case, simply return an error instead, to indicate
that no data is available.

References:

https://git.kernel.org/stable/c/1571120c44dbe5757aee1612c5b6097cdc42710f

https://git.kernel.org/stable/c/298e767362cade639b7121ecb3cc5345b6529f62

https://git.kernel.org/stable/c/efeae5f4972f75d50002bc50eb112ab9e7069b18

https://git.kernel.org/stable/c/717de20abdcd1d4993fa450e28b8086a352620ea

https://git.kernel.org/stable/c/21a0f310a9f3bfd2b4cf4f382430e638607db846

https://git.kernel.org/stable/c/2be24c47ac19bf639c48c082486c08888bd603c6

https://git.kernel.org/stable/c/adc2474d823fe81d8da759207f4f1d3691aa775a

https://git.kernel.org/stable/c/5a94cffe90e20e8fade0b9abd4370bd671fe87c7

https://git.kernel.org/stable/c/e160ab85166e77347d0cbe5149045cb25e83937f

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