What is CVE-2021-47025?

CVE-2021-47025 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.12 onward and patched in 5.12.4 and 5.13. CVE-2021-47025 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47025?

CVE-2021-47025 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-2021-47025?

Yes, CVE-2021-47025 has been patched. Fixed versions include 5.12.4 and 5.13. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47025 actively exploited?

CVE-2021-47025 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47025

High

In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: Always enable the clk on resume In mtk_iommu_runtime_resume always enable the clk, even if m4u_dom is null. Otherwise the 'suspend' cb might disable the clk which is already disabled causing the warning: [ 1.586104] infra_m4u already disabled [ 1.586133] WARNING: CPU: 0 PID: 121 at drivers/clk/clk.c:952 clk_core_disable+0xb0/0xb8 [ 1.594391] mtk-iommu 10205000.iommu: bound 18001000.larb (ops mtk_smi_larb_component_ops) [ 1.598108] Modules linked in: [ 1.598114] CPU: 0 PID: 121 Comm: kworker/0:2 Not tainted 5.12.0-rc5 #69 [ 1.609246] mtk-iommu 10205000.iommu: bound 14027000.larb (ops mtk_smi_larb_component_ops) [ 1.617487] Hardware name: Google Elm (DT) [ 1.617491] Workqueue: pm pm_runtime_work [ 1.620545] mtk-iommu 10205000.iommu: bound 19001000.larb (ops mtk_smi_larb_component_ops) [ 1.627229] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--) [ 1.659297] pc : clk_core_disable+0xb0/0xb8 [ 1.663475] lr : clk_core_disable+0xb0/0xb8 [ 1.667652] sp : ffff800011b9bbe0 [ 1.670959] x29: ffff800011b9bbe0 x28: 0000000000000000 [ 1.676267] x27: ffff800011448000 x26: ffff8000100cfd98 [ 1.681574] x25: ffff800011b9bd48 x24: 0000000000000000 [ 1.686882] x23: 0000000000000000 x22: ffff8000106fad90 [ 1.692189] x21: 000000000000000a x20: ffff0000c0048500 [ 1.697496] x19: ffff0000c0048500 x18: ffffffffffffffff [ 1.702804] x17: 0000000000000000 x16: 0000000000000000 [ 1.708112] x15: ffff800011460300 x14: fffffffffffe0000 [ 1.713420] x13: ffff8000114602d8 x12: 0720072007200720 [ 1.718727] x11: 0720072007200720 x10: 0720072007200720 [ 1.724035] x9 : ffff800011b9bbe0 x8 : ffff800011b9bbe0 [ 1.729342] x7 : 0000000000000009 x6 : ffff8000114b8328 [ 1.734649] x5 : 0000000000000000 x4 : 0000000000000000 [ 1.739956] x3 : 00000000ffffffff x2 : ffff800011460298 [ 1.745263] x1 : 1af1d7de276f4500 x0 : 0000000000000000 [ 1.750572] Call trace: [ 1.753010] clk_core_disable+0xb0/0xb8 [ 1.756840] clk_core_disable_lock+0x24/0x40 [ 1.761105] clk_disable+0x20/0x30 [ 1.764501] mtk_iommu_runtime_suspend+0x88/0xa8 [ 1.769114] pm_generic_runtime_suspend+0x2c/0x48 [ 1.773815] __rpm_callback+0xe0/0x178 [ 1.777559] rpm_callback+0x24/0x88 [ 1.781041] rpm_suspend+0xdc/0x470 [ 1.784523] rpm_idle+0x12c/0x170 [ 1.787831] pm_runtime_work+0xa8/0xc0 [ 1.791573] process_one_work+0x1e8/0x360 [ 1.795580] worker_thread+0x44/0x478 [ 1.799237] kthread+0x150/0x158 [ 1.802460] ret_from_fork+0x10/0x30 [ 1.806034] ---[ end trace 82402920ef64573b ]--- [ 1.810728] ------------[ cut here ]------------ In addition, we now don't need to enable the clock from the function mtk_iommu_hw_init since it is already enabled by the resume.

Package Linux Kernel

Published 2024-02-28

Last modified 2024-12-06

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

Affected versions

Linux kernel versions 5.12 and later are affected. Fixed in 5.12.4, 5.13 and their respective stable series.

Affected from

≥ 5.12

Fixed in

✓ 5.12.4 5.12.x ✓ 5.13

References

2 total

Kernel Git
https://git.kernel.org/stable/c/5cad9e2caa9613fdcd246bd4ebf0ffbec1cba2ca

Patch
Kernel Git
https://git.kernel.org/stable/c/b34ea31fe013569d42b7e8681ef3f717f77c5b72

Patch

Details

CVE ID CVE-2021-47025

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2024-12-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47025?

CVE-2021-47025 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.12 onward and has been patched in 5.12.4 and 5.13. CVE-2021-47025 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47025?

CVE-2021-47025 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-2021-47025?

Yes. CVE-2021-47025 has been patched. Fixed versions include 5.12.4 and 5.13. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47025 actively exploited?

No. CVE-2021-47025 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.