Linux Kernel up to 6.1.4 caif cfctrl_linkup_request memory leak

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.1.4 and classified as critical. This issue affects the function cfctrl_linkup_request of the component caif. Performing a manipulation results in memory leak. This vulnerability is reported as CVE-2023-53330. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.1.4. It has been classified as critical. This affects the function cfctrl_linkup_request of the component caif. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: caif: fix memory leak in cfctrl_linkup_request() When linktype is unknown or kzalloc failed in cfctrl_linkup_request(), pkt is not released. Add release process to error path.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53330 since 09/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 265667 (Linux Distros Unpatched Vulnerability : CVE-2023-53330), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.19 or 6.1.5 eliminates this vulnerability. Applying the patch badea57569db04b010e922e29a7aaf40a979a70b/3acf3783a84cbdf0c9f8cf2f32ee9c49af93a2da/33df9c5d5e2a18c70f5f5f3c2757d654c1b6ffa3/84b2cc7b36b7f6957d307fb3d01603f93cb2d655/dc1bc903970bdf63ca40ab923d3ccb765da9a8d9/1dddeceb26002cfea4c375e92ac6498768dc7349/3ad47c8aa5648226184415e4a0cb1bf67ffbfd48/fe69230f05897b3de758427b574fc98025dfc907 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (265667) and CERT Bund (WID-SEC-2025-2077). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• IBM QRadar SIEM
• SUSE openSUSE
• Open Source Linux Kernel
• RESF Rocky Linux
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.302
• 4.19.269
• 5.4.228
• 5.10.162
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.15.56
• 5.15.57
• 5.15.58
• 5.15.59
• 5.15.60
• 5.15.61
• 5.15.62
• 5.15.63
• 5.15.64
• 5.15.65
• 5.15.66
• 5.15.67
• 5.15.68
• 5.15.69
• 5.15.70
• 5.15.71
• 5.15.72
• 5.15.73
• 5.15.74
• 5.15.75
• 5.15.76
• 5.15.77
• 5.15.78
• 5.15.79
• 5.15.80
• 5.15.81
• 5.15.82
• 5.15.83
• 5.15.84
• 5.15.85
• 5.15.86
• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.0.16
• 6.0.17
• 6.0.18
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
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CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 265667
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53330

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.303/4.19.270/5.4.229/5.10.163/5.15.87/6.0.19/6.1.5
Patch: badea57569db04b010e922e29a7aaf40a979a70b/3acf3783a84cbdf0c9f8cf2f32ee9c49af93a2da/33df9c5d5e2a18c70f5f5f3c2757d654c1b6ffa3/84b2cc7b36b7f6957d307fb3d01603f93cb2d655/dc1bc903970bdf63ca40ab923d3ccb765da9a8d9/1dddeceb26002cfea4c375e92ac6498768dc7349/3ad47c8aa5648226184415e4a0cb1bf67ffbfd48/fe69230f05897b3de758427b574fc98025dfc907

Timelineinfo

09/16/2025 Advisory disclosed
09/16/2025 +0 days CVE reserved
09/16/2025 +0 days VulDB entry created
12/27/2025 +102 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53330 (🔒)
GCVE (CVE): GCVE-0-2023-53330
GCVE (VulDB): GCVE-100-324537
CERT Bund: WID-SEC-2025-2077 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 09/16/2025 20:40
Updated: 12/27/2025 12:28
Changes: 09/16/2025 20:40 (59), 09/21/2025 03:21 (2), 10/21/2025 06:17 (7), 12/10/2025 21:41 (10), 12/27/2025 12:28 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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