What is CVE-2021-47486?

CVE-2021-47486 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.7 onward and patched in 5.10.77, 5.14.16 and 5.15. CVE-2021-47486 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47486?

CVE-2021-47486 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47486?

Yes, CVE-2021-47486 has been patched. Fixed versions include 5.10.77, 5.14.16 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-2021-47486 actively exploited?

CVE-2021-47486 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-47486

High

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpf_jit_binary_free() function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NR_JIT_ITERATIONS steps, jit_data->header will be NULL, which triggers a NULL dereference. Avoid this by checking the argument, prior calling the function.

Package Linux Kernel

Published 2024-05-22

Last modified 2025-04-01

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2021-47486 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 5.10.77, 5.14.16, 5.15 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.77 5.10.x ✓ 5.14.16 5.14.x ✓ 5.15

References

3 total

Kernel Git
https://git.kernel.org/stable/c/27de809a3d83a6199664479ebb19712533d6fd9b

Patch
Kernel Git
https://git.kernel.org/stable/c/cac6b043cea3e120f4fccec16f7381747cbfdc0d

Patch
Kernel Git
https://git.kernel.org/stable/c/e1b80a5ebe5431caeb20f88c32d4a024777a2d41

Patch

Details

CVE ID CVE-2021-47486

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-04-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47486?

CVE-2021-47486 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.77, 5.14.16 and 5.15. CVE-2021-47486 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47486?

CVE-2021-47486 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47486?

Yes. CVE-2021-47486 has been patched. Fixed versions include 5.10.77, 5.14.16 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-2021-47486 actively exploited?

No. CVE-2021-47486 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.