CVE-2021-47564

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

VendorProductVersions
LinuxLinux>= e1189d9a5fbec8153dbe03f3589bc2baa96694e2, < 5dca8eff4627315df98feec09fff9dfe3356325e; >= e1189d9a5fbec8153dbe03f3589bc2baa96694e2, < 03e5203d2161a00afe4d97d206d2293e40b2f253; >= e1189d9a5fbec8153dbe03f3589bc2baa96694e2, < e8d032507cb7912baf1d3e0af54516f823befefd
LinuxLinux5.10

References

Timeline

Published
May 24, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-47564: High severity, CVSS 7.8 | Vulnix