In the Linux kernel, the following vulnerability has been resolved: net:
marvell: prestera: fix double free issue on err path fix error path
handling in prestera_bridge_port_join() that cases prestera driver to crash
(see below). Trace: Internal error: Oops: 96000044 [#1] SMP Modules linked
in: prestera_pci prestera uio_pdrv_genirq CPU: 1 PID: 881 Comm: ip Not
tainted 5.15.0 #1 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS
BTYPE=–) pc : prestera_bridge_destroy+0x2c/0xb0 [prestera] lr :
prestera_bridge_port_join+0x2cc/0x350 [prestera] sp : ffff800011a1b0f0 …
x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122 Call
trace: prestera_bridge_destroy+0x2c/0xb0 [prestera]
prestera_bridge_port_join+0x2cc/0x350 [prestera]
prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera]
prestera_netdev_event_handler+0xf4/0x110 [prestera]
raw_notifier_call_chain+0x54/0x80 call_netdevice_notifiers_info+0x54/0xa0
__netdev_upper_dev_link+0x19c/0x380
git.kernel.org/linus/e8d032507cb7912baf1d3e0af54516f823befefd (5.16-rc3)
git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253
git.kernel.org/stable/c/5dca8eff4627315df98feec09fff9dfe3356325e
git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd
launchpad.net/bugs/cve/CVE-2021-47564
nvd.nist.gov/vuln/detail/CVE-2021-47564
security-tracker.debian.org/tracker/CVE-2021-47564
www.cve.org/CVERecord?id=CVE-2021-47564