CVE-2022-50386

Summary

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

Bluetooth: L2CAP: Fix user-after-free

This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace:

Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08

BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 11e40d6c0823f699d8ad501e48d1c3ae4be386cdaffected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 843fc4e386dd84b806a7f07fb062d8c3a44e5364affected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < d91fc2836562f299f34e361e089e9fe154da4f73affected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45affected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 0c108cf3ad386e0084277093b55a351c49e0be27affected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < d1e894f950ad48897d1a7cb05909ea29d8c3810eaffected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 6ffde6e03085874ae22263ff4cef4869f797e84faffected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 15fc21695eb606bdc5d483b92118ee42610a952daffected
LinuxLinux3df91ea20e744344100b10ae69a17211fcf5b207 < 35fcbc4243aad7e7d020b7c1dfb14bb888b20a4faffected
LinuxLinux3.4affected
LinuxLinux0 < 3.4unaffected
LinuxLinux4.9.331 <= 4.9.*unaffected
LinuxLinux4.14.296 <= 4.14.*unaffected
LinuxLinux4.19.262 <= 4.19.*unaffected
LinuxLinux5.4.220 <= 5.4.*unaffected
LinuxLinux5.10.150 <= 5.10.*unaffected
LinuxLinux5.15.75 <= 5.15.*unaffected
LinuxLinux5.19.17 <= 5.19.*unaffected
LinuxLinux6.0.3 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References