CVE-2023-52832

moderate-risk
Published 2024-05-21

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.

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (15)

Patch https://git.kernel.org/stable/c/21a0f310a9f3bfd2b4cf4f382430e638607db846
Patch https://git.kernel.org/stable/c/2be24c47ac19bf639c48c082486c08888bd603c6
Patch https://git.kernel.org/stable/c/5a94cffe90e20e8fade0b9abd4370bd671fe87c7
Patch https://git.kernel.org/stable/c/717de20abdcd1d4993fa450e28b8086a352620ea
Patch https://git.kernel.org/stable/c/adc2474d823fe81d8da759207f4f1d3691aa775a
Patch https://git.kernel.org/stable/c/e160ab85166e77347d0cbe5149045cb25e83937f
Patch https://git.kernel.org/stable/c/1571120c44dbe5757aee1612c5b6097cdc42710f
Patch https://git.kernel.org/stable/c/21a0f310a9f3bfd2b4cf4f382430e638607db846
Patch https://git.kernel.org/stable/c/298e767362cade639b7121ecb3cc5345b6529f62
Patch https://git.kernel.org/stable/c/2be24c47ac19bf639c48c082486c08888bd603c6
Patch https://git.kernel.org/stable/c/5a94cffe90e20e8fade0b9abd4370bd671fe87c7
Patch https://git.kernel.org/stable/c/717de20abdcd1d4993fa450e28b8086a352620ea
Patch https://git.kernel.org/stable/c/adc2474d823fe81d8da759207f4f1d3691aa775a
Patch https://git.kernel.org/stable/c/e160ab85166e77347d0cbe5149045cb25e83937f
Patch https://git.kernel.org/stable/c/efeae5f4972f75d50002bc50eb112ab9e7069b18
36
/ 100
moderate-risk
Severity 31/34 · Critical
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal