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CVE-2022-48828

9.1 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type.

Published Jul 16, 2024CWE-191EPSS 0.63%

Overview

CVE-2022-48828 is a critical-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

NFSD: Fix ia_size underflow

iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and

NFSv4 both define file size as an unsigned 64-bit type. Thus there

is a range of valid file size values an NFS client can send that is

already larger than Linux can handle.

Currently decode_fattr4() dumps a full u64 value into ia_size. If

that value happens to be larger than S64_MAX, then ia_size

underflows. I'm about to fix up the NFSv3 behavior as well, so let's

catch the underflow in the common code path: nfsd_setattr().

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/38d02ba22e43b6fc7d291cf724bc6e3b7be6626bRefgit.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48Refgit.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71Refgit.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7Refgit.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0eRefgit.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626bRefgit.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48Refgit.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7Refgit.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0eRefcert-portal.siemens.com/productcert/html/ssa-265688.html

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48828?

CVE-2022-48828 is a critical-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2022-48828?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-48828?

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-2022-48828?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48828 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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