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CVE-2023-52681

17
FAUCET Score

CVE-2023-52681 is a memory leak vulnerability in the Linux kernel's efivarfs filesystem, specifically affecting versions where a s_fs_info struct is allocated during filesystem context creation but not properly freed upon unmount. This flaw has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring low privileges, and leading to high availability impact (denial of service) without affecting confidentiality or integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.7, < 6.7.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 57th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2023-52681Moderate

kernel: efivarfs: Free s_fs_info on unmount

May 17, 2024

References

git.kernel.org / stable/c/547713d502f7b4b8efccd409cff84d731a23853b
Patch
git.kernel.org / stable/c/92be3095c6ca1cdc46237839c6087555be9160e3
Patch
git.kernel.org / stable/c/48be1364dd387e375e1274b76af986cb8747be2c
Patch
git.kernel.org / stable/c/ea6b597fcaca99562fa56a473bcbbbd79b40af03
Patch