CVE-2021-47564

Summary

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

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe1189d9a5fbec8153dbe03f3589bc2baa96694e2 < 5dca8eff4627315df98feec09fff9dfe3356325eaffected
LinuxLinuxe1189d9a5fbec8153dbe03f3589bc2baa96694e2 < 03e5203d2161a00afe4d97d206d2293e40b2f253affected
LinuxLinuxe1189d9a5fbec8153dbe03f3589bc2baa96694e2 < e8d032507cb7912baf1d3e0af54516f823befefdaffected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.83 <= 5.10.*unaffected
LinuxLinux5.15.6 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References