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CVE-2023-53399

18
FAUCET Score

CVE-2023-53399 is a NULL pointer dereference vulnerability in the Linux kernel's ksmbd module, specifically within the smb2_get_info_filesystem() function, affecting Linux kernel versions. This medium-severity vulnerability (CVSS 5.5) can lead to a denial of service (availability impact) if a local, low-privileged attacker triggers the flaw without user interaction. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.15, < 5.15.111CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.28CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.2.15CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.3, < 6.3.2CPE 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
0.14%
Probability of exploitation in next 30 days
EPSS Percentile
3.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0014 is in the 22nd percentile among its peer group of 15,940 CVEs.

Social Chatter

No social media mentions found for this CVE.

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-2023-53399

kernel: ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem()

Sep 18, 2025

References

git.kernel.org / stable/c/1636e09779f83e10e6ed57d91ef94abcefdd206b
Patch
git.kernel.org / stable/c/227eb2689b44d0d60da3839b146983e73435924c
Patch
git.kernel.org / stable/c/3ac00a2ab69b34189942afa9e862d5170cdcb018
Patch
git.kernel.org / stable/c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb
Patch
git.kernel.org / stable/c/b35f6c031b87d9e51f141ff6de0ea59756a8e313
Patch