What is CVE-2021-3178?

CVE-2021-3178 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.5 out of 10. CVE-2021-3178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3178?

CVE-2021-3178 has a CVSS score of 6.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Is there a patch available for CVE-2021-3178?

No patch is currently available for CVE-2021-3178. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3178 actively exploited?

CVE-2021-3178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-3178

Medium

fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior

Package Linux Kernel

Published 2021-01-19

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.5

out of 10

Medium

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Vector string

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

Weakness type

CWE-22

CVE-2021-3178 is classified as CWE-22

See CWE-22 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-3178 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

Mailing List Third Party Advisory
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/
Kernel.org
https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652%40fieldses.org/
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6
Patch

Details

CVE ID CVE-2021-3178

Severity Medium

CVSS score 6.5 / 10

CVSS version 3.1

Published 2021-01-19

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3178?

CVE-2021-3178 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.5 out of 10 . CVE-2021-3178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3178?

CVE-2021-3178 has a CVSS score of 6.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
Is there a patch available for CVE-2021-3178?

No patch is currently available for CVE-2021-3178. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3178 actively exploited?

No — CVE-2021-3178 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.