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CVE-2021-47274

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: tracing: Correct the length check which causes memory corruption We've suffered from severe kernel crashes due to memory corrup…

Published May 21, 2024CWE-125EPSS 0.75%

Overview

CVE-2021-47274 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

tracing: Correct the length check which causes memory corruption

We've suffered from severe kernel crashes due to memory corruption on

our production environment, like,

Call Trace:

[1640542.554277] general protection fault: 0000 [#1] SMP PTI

[1640542.554856] CPU: 17 PID: 26996 Comm: python Kdump: loaded Tainted:G

[1640542.556629] RIP: 0010:kmem_cache_alloc+0x90/0x190

[1640542.559074] RSP: 0018:ffffb16faa597df8 EFLAGS: 00010286

[1640542.559587] RAX: 0000000000000000 RBX: 0000000000400200 RCX:

0000000006e931bf

[1640542.560323] RDX: 0000000006e931be RSI: 0000000000400200 RDI:

ffff9a45ff004300

[1640542.560996] RBP: 0000000000400200 R08: 0000000000023420 R09:

0000000000000000

[1640542.561670] R10: 0000000000000000 R11: 0000000000000000 R12:

ffffffff9a20608d

[1640542.562366] R13: ffff9a45ff004300 R14: ffff9a45ff004300 R15:

696c662f65636976

[1640542.563128] FS: 00007f45d7c6f740(0000) GS:ffff9a45ff840000(0000)

knlGS:000000

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097fRefgit.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883Refgit.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3Refgit.kernel.org/stable/c/43c32c22254b9328d7abb1c2b0f689dc67838e60Refgit.kernel.org/stable/c/b16a249eca2230c2cd66fa1d4b94743bd9b6ef92Refgit.kernel.org/stable/c/d63f00ec908b3be635ead5d6029cc94246e1f38dRefgit.kernel.org/stable/c/edcce01e0e50840a9aa6a70baed21477bdd2c9f9Refgit.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097fRefgit.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883Refgit.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47274?

CVE-2021-47274 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47274?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47274?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47274?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47274 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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