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CVE-2023-4133

16
FAUCET Score

CVE-2023-4133 is a use-after-free vulnerability in the Linux kernel's cxgb4 driver, affecting various Fedora and Red Hat Enterprise Linux distributions. This flaw, triggered by the cxgb4 device detaching and rearming of the flower_stats_timer, allows a local user to crash the system, leading to a denial of service. Rated 5.5 MEDIUM, it requires local access with low attack complexity and no user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:*

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
12.5%
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 56th 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

Patch Available

Vendor Patches (7)

microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.158.2-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.158.2-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-553.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-427.13.1.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-553.rt7.342.el8_10
View patch
redhatvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (3)

microsoft2024-May/CVE-2023-4133

CVE-2023-4133

May 14, 2024
microsoft2023-Aug/CVE-2023-4133

Kernel: cxgb4: use-after-free in ch_flower_stats_cb()

Aug 8, 2023
redhatCVE-2023-4133Moderate

kernel: cxgb4: use-after-free in ch_flower_stats_cb()

Apr 15, 2023

References

access.redhat.com / errata/RHSA-2024:2394
access.redhat.com / errata/RHSA-2024:2950
access.redhat.com / errata/RHSA-2024:3138
access.redhat.com / security/cve/CVE-2023-4133
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking