What is CVE-2021-47042?

CVE-2021-47042 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 5.12 onward and patched in 5.12.4 and 5.13. CVE-2021-47042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47042?

CVE-2021-47042 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47042?

Yes, CVE-2021-47042 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-2021-47042 actively exploited?

CVE-2021-47042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2021-47042

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Free local data after use Fixes the following memory leak in dc_link_construct(): unreferenced object 0xffffa03e81471400 (size 1024): comm "amd_module_load", pid 2486, jiffies 4294946026 (age 10.544s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000bdf5c4a>] kmem_cache_alloc_trace+0x30a/0x4a0 [<00000000e7c59f0e>] link_create+0xce/0xac0 [amdgpu] [<000000002fb6c072>] dc_create+0x370/0x720 [amdgpu] [<000000000094d1f3>] amdgpu_dm_init+0x18e/0x17a0 [amdgpu] [<00000000bec048fd>] dm_hw_init+0x12/0x20 [amdgpu] [<00000000a2bb7cf6>] amdgpu_device_init+0x1463/0x1e60 [amdgpu] [<0000000032d3bb13>] amdgpu_driver_load_kms+0x5b/0x330 [amdgpu] [<00000000a27834f9>] amdgpu_pci_probe+0x192/0x280 [amdgpu] [<00000000fec7d291>] local_pci_probe+0x47/0xa0 [<0000000055dbbfa7>] pci_device_probe+0xe3/0x180 [<00000000815da970>] really_probe+0x1c4/0x4e0 [<00000000b4b6974b>] driver_probe_device+0x62/0x150 [<000000000f9ecc61>] device_driver_attach+0x58/0x60 [<000000000f65c843>] __driver_attach+0xd6/0x150 [<000000002f5e3683>] bus_for_each_dev+0x6a/0xc0 [<00000000a1cfc897>] driver_attach+0x1e/0x20

Package Linux Kernel

Published 2024-02-28

Last modified 2024-12-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-401

CVE-2021-47042 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

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/296443139f893b554dddd56a99ba8471ab5802d4

Patch
Kernel Git
https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1

Patch

Details

CVE ID CVE-2021-47042

Severity Medium

CVSS score 5.5 / 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-2021-47042?

CVE-2021-47042 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 5.12 onward and has been patched in 5.12.4 and 5.13. CVE-2021-47042 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47042?

CVE-2021-47042 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47042?

Yes. CVE-2021-47042 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-2021-47042 actively exploited?

No. CVE-2021-47042 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.