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CVE-2023-53233

20
FAUCET Score

CVE-2023-53233 is a deadlock vulnerability in the Linux kernel's SMC (Shared Memory Communications) network subsystem. Specifically, it arises from an issue with cancel_delayed_work_syn(), leading to a circular locking dependency. This affects various versions of the Linux kernel. The vulnerability has a CVSSv3.1 score of 5.5 (MEDIUM), indicating a local attack vector with low attack complexity, requiring low privileges, and resulting in high availability impact (denial of service). There is no confidentiality or integrity impact. Currently, there is no evidence of active exploitation, nor are there any publicly available exploit codes in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness or interest at this time.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.8, < 5.10.176CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.15.104CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.2.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*

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
0.11%
Probability of exploitation in next 30 days
EPSS Percentile
1.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0011 is in the 9th 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 Patches (4)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2023-53233Low

kernel: net/smc: fix deadlock triggered by cancel_delayed_work_syn()

Sep 15, 2025

References

git.kernel.org / stable/c/13085e1b5cab8ad802904d72e6a6dae85ae0cd20
Patch
git.kernel.org / stable/c/3517584cf1b35bd02f4a90267ddf9dcf17bd9c87
Patch
git.kernel.org / stable/c/9708efad9ba5095b9bb7916e11a135b3bd66c071
Patch
git.kernel.org / stable/c/b615238e5bc01e13dc0610febddc1ca99bab1df6
Patch
git.kernel.org / stable/c/c9ca2257150272df1b8d9ebe5059197ffea6e913
Patch