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CVE-2021-47078

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Clear all QP fields if creation failed rxe_qp_do_cleanup() relies on valid pointer values in QP for the properly crea…

Published Mar 1, 2024CWE-416EPSS 0.28%

Overview

CVE-2021-47078 is a high-severity vulnerability. It was published on March 1, 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:

RDMA/rxe: Clear all QP fields if creation failed

rxe_qp_do_cleanup() relies on valid pointer values in QP for the properly

created ones, but in case rxe_qp_from_init() failed it was filled with

garbage and caused tot the following error.

refcount_t: underflow; use-after-free.

WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28

Modules linked in:

CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28

Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55

RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286

RAX: 0000000000000000 RBX: 0000000000000000 RC

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/03344e843ab6dd3b3f2cadfb65ed910590856c70Refgit.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3Refgit.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228Refgit.kernel.org/stable/c/6a8086a42dfbf548a42bf2ae4faa291645c72c66Refgit.kernel.org/stable/c/a62225d951d77eb20208fed8fc199e0c9b1df08bRefgit.kernel.org/stable/c/c65391dd9f0a47617e96e38bd27e277cbe1c40b0Refgit.kernel.org/stable/c/f3783c415bf6d2ead3d7aa2c38802bbe10723646Refgit.kernel.org/stable/c/03344e843ab6dd3b3f2cadfb65ed910590856c70Refgit.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3Refgit.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47078?

CVE-2021-47078 is a high-severity vulnerability. It was published on March 1, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47078?

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-2021-47078?

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-2021-47078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47078 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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