What is CVE-2021-47444?

CVE-2021-47444 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.7 onward and patched in 5.10.75, 5.14.14 and 5.15. CVE-2021-47444 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47444?

CVE-2021-47444 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-2021-47444?

Yes, CVE-2021-47444 has been patched. Fixed versions include 5.10.75, 5.14.14 and 5.15. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47444 actively exploited?

CVE-2021-47444 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47444

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/edid: In connector_bad_edid() cap num_of_ext by num_blocks read In commit e11f5bd8228f ("drm: Add support for DP 1.4 Compliance edid corruption test") the function connector_bad_edid() started assuming that the memory for the EDID passed to it was big enough to hold `edid[0x7e] + 1` blocks of data (1 extra for the base block). It completely ignored the fact that the function was passed `num_blocks` which indicated how much memory had been allocated for the EDID. Let's fix this by adding a bounds check. This is important for handling the case where there's an error in the first block of the EDID. In that case we will call connector_bad_edid() without having re-allocated memory based on `edid[0x7e]`.

Package Linux Kernel

Published 2024-05-22

Last modified 2025-09-25

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

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 5.10.75, 5.14.14, 5.15 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.75 5.10.x ✓ 5.14.14 5.14.x ✓ 5.15

References

3 total

Kernel Git
https://git.kernel.org/stable/c/09f3946bb452918dbfb1982add56f9ffaae393dc

Patch
Kernel Git
https://git.kernel.org/stable/c/97794170b696856483f74b47bfb6049780d2d3a0

Patch
Kernel Git
https://git.kernel.org/stable/c/a7b45024f66f9ec769e8dbb1a51ae83cd05929c7

Patch

Details

CVE ID CVE-2021-47444

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-09-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47444?

CVE-2021-47444 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.75, 5.14.14 and 5.15. CVE-2021-47444 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47444?

CVE-2021-47444 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-2021-47444?

Yes. CVE-2021-47444 has been patched. Fixed versions include 5.10.75, 5.14.14 and 5.15. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47444 actively exploited?

No. CVE-2021-47444 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.