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CVE-2023-53306

20
FAUCET Score

CVE-2023-53306 is a vulnerability in the Linux kernel's fsdax module, specifically impacting the handling of Copy-on-Write (CoW) operations in XFS filesystems. It arises when a previously modified (dirty) non-shared extent is subject to CoW, leading to a kernel warning due to an uncleared dirty mark. This vulnerability is rated as Medium severity (CVSS 5.5), indicating a local attack vector with low complexity, requiring local privileges, and potentially leading to a denial of service (system crash). There is currently no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.2, < 6.2.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*

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
0.13%
Probability of exploitation in next 30 days
EPSS Percentile
2.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0013 is in the 19th 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-2023-53306Moderate

kernel: fsdax: force clear dirty mark if CoW

Sep 16, 2025

References

git.kernel.org / stable/c/f76b3a32879de215ced3f8c754c4077b0c2f79e3
Patch
git.kernel.org / stable/c/fac05f800abb63dc4d7cc48fe7edf16e0520dc1f
Patch