What is CVE-2021-47291?

CVE-2021-47291 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Read flaw (CWE-125), affecting Linux kernel versions from 5.3 onward and patched in 5.4.136, 5.10.54, 5.13.6 and others. CVE-2021-47291 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47291?

CVE-2021-47291 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2021-47291?

Yes, CVE-2021-47291 has been patched. Fixed versions include 5.4.136, 5.10.54, 5.13.6 and others. If you are running Linux kernel 5.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47291 actively exploited?

CVE-2021-47291 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2021-47291

High

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2021-47291 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.3 and later are affected. Fixed in 5.4.136, 5.10.54, 5.13.6, 5.14 and their respective stable series.

Affected from

≥ 5.3

Fixed in

✓ 5.4.136 5.4.x ✓ 5.10.54 5.10.x ✓ 5.13.6 5.13.x ✓ 5.14

References

4 total

Kernel Git
https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0

Patch
Kernel Git
https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6

Patch
Kernel Git
https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5

Patch
Kernel Git
https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680

Patch

Details

CVE ID CVE-2021-47291

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47291?

CVE-2021-47291 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . It affects Linux kernel versions from 5.3 onward and has been patched in 5.4.136, 5.10.54, 5.13.6 and others. CVE-2021-47291 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47291?

CVE-2021-47291 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2021-47291?

Yes. CVE-2021-47291 has been patched. Fixed versions include 5.4.136, 5.10.54, 5.13.6 and others. If you are running Linux kernel 5.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47291 actively exploited?

No. CVE-2021-47291 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.