Is CVE-2021-46923 in the CISA KEV catalog?

No. CVE-2021-46923 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-46923?

CVE-2021-46923 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-46923?

CVE-2021-46923 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-46923?

Upgrade linux on debian 12 to 5.15.15-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-46923

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: fs/mount_setattr: always cleanup mount_kattr Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.

CWE-668

How to fix

Remediation Available

linuxDebian

Fixed in:5.15.15-1CVE-2021-46923

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-
CVE-2022-25236	Critical	9.8	34%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.