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CVE-2024-43843

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix out-of-bounds issue when preparing trampoline image We get the size of the trampoline image during the dry run…

Published Aug 17, 2024CWE-131EPSS 0.20%

Overview

CVE-2024-43843 is a high-severity vulnerability. It was published on August 17, 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:

riscv, bpf: Fix out-of-bounds issue when preparing trampoline image

We get the size of the trampoline image during the dry run phase and

allocate memory based on that size. The allocated image will then be

populated with instructions during the real patch phase. But after

commit 26ef208c209a ("bpf: Use arch_bpf_trampoline_size"), the `im`

argument is inconsistent in the dry run and real patch phase. This may

cause emit_imm in RV64 to generate a different number of instructions

when generating the 'im' address, potentially causing out-of-bounds

issues. Let's emit the maximum number of instructions for the "im"

address during dry run to fix this problem.

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/3e6a1b1b179abb643ec3560c02bc3082bc92285fRefgit.kernel.org/stable/c/9f1e16fb1fc9826001c69e0551d51fbbcd2d74e9

How CyberStrike helps

Frequently asked questions

What is CVE-2024-43843?

CVE-2024-43843 is a high-severity vulnerability. It was published on August 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-43843?

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-2024-43843?

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-2024-43843?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-43843 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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