CVE-2023-52832

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < 717de20abdcd1d4993fa450e28b8086a352620eaaffected
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < 21a0f310a9f3bfd2b4cf4f382430e638607db846affected
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < 2be24c47ac19bf639c48c082486c08888bd603c6affected
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < adc2474d823fe81d8da759207f4f1d3691aa775aaffected
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < 5a94cffe90e20e8fade0b9abd4370bd671fe87c7affected
LinuxLinuxdb6d9e9e8b48b7ab68c61553eb5fa68534dd0fde < e160ab85166e77347d0cbe5149045cb25e83937faffected
LinuxLinux5.7affected
LinuxLinux0 < 5.7unaffected
LinuxLinux5.10.202 <= 5.10.*unaffected
LinuxLinux5.15.140 <= 5.15.*unaffected
LinuxLinux6.1.64 <= 6.1.*unaffected
LinuxLinux6.5.13 <= 6.5.*unaffected
LinuxLinux6.6.3 <= 6.6.*unaffected
LinuxLinux6.7 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

CVE Program Container

Additional References

References