What is CVE-2021-47564?

CVE-2021-47564 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 5.10.83, 5.15.6 and 5.16. CVE-2021-47564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47564?

CVE-2021-47564 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47564?

Yes, CVE-2021-47564 has been patched. Fixed versions include 5.10.83, 5.15.6 and 5.16. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47564 actively exploited?

CVE-2021-47564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47564

High

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

Package Linux Kernel

Published 2024-05-24

Last modified 2025-01-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-415

CVE-2021-47564 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 5.10.83, 5.15.6, 5.16 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.83 5.10.x ✓ 5.15.6 5.15.x ✓ 5.16

References

3 total

Kernel Git
https://git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253

Patch
Kernel Git
https://git.kernel.org/stable/c/5dca8eff4627315df98feec09fff9dfe3356325e

Patch
Kernel Git
https://git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd

Patch

Details

CVE ID CVE-2021-47564

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2025-01-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47564?

CVE-2021-47564 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.83, 5.15.6 and 5.16. CVE-2021-47564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47564?

CVE-2021-47564 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47564?

Yes. CVE-2021-47564 has been patched. Fixed versions include 5.10.83, 5.15.6 and 5.16. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47564 actively exploited?

No. CVE-2021-47564 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.