CVE-2022-50386
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- CVSS 3.1
- 8.0 HIGHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.36% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27Patch
- https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cdPatch
- https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952dPatch
- https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4fPatch
- https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84fPatch
- https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45Patch
- https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364Patch
- https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810ePatch
- https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.