Linux Kernel up to a41cd52f00907a040ca22c73d4805bb79b0d0972 ksmbd parse_lease_state memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to a41cd52f00907a040ca22c73d4805bb79b0d0972 and classified as critical. This issue affects the function parse_lease_state of the component ksmbd. Performing a manipulation results in memory leak. This vulnerability was named CVE-2025-37962. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to a41cd52f00907a040ca22c73d4805bb79b0d0972. This affects the function parse_lease_state of the component ksmbd. 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: ksmbd: fix memory leak in parse_lease_state() The previous patch that added bounds check for create lease context introduced a memory leak. When the bounds check fails, the function returns NULL without freeing the previously allocated lease_ctx_info structure. This patch fixes the issue by adding kfree(lreq) before returning NULL in both boundary check cases.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-37962 since 04/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 237223 (Debian dsa-5925 : affs-modules-6.1.0-33-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.139, 6.6.91, 6.12.29, 6.14.7, 6.15-rc1 or 6.15-rc6 eliminates this vulnerability. Applying the patch facf22c1a394c1e023dab5daf9a494f722771e1c/af9e2d4732a548db8f6f5a90c2c20a789a3d7240/2148d34371b06dac696c0497a98a6bf905a51650/829e19ef741d9e9932abdc3bee5466195e0852cf/eb4447bcce915b43b691123118893fca4f372a8f 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 (237223) and CERT Bund (WID-SEC-2025-1114). 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
  • SUSE openSUSE
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

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

AVACAuCIA
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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: 🔍

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Nessus ID: 237223
Nessus Name: Debian dsa-5925 : affs-modules-6.1.0-33-4kc-malta-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1.139/6.6.91/6.12.29/6.14.7/6.15-rc1/6.15-rc6
Patch: facf22c1a394c1e023dab5daf9a494f722771e1c/af9e2d4732a548db8f6f5a90c2c20a789a3d7240/2148d34371b06dac696c0497a98a6bf905a51650/829e19ef741d9e9932abdc3bee5466195e0852cf/eb4447bcce915b43b691123118893fca4f372a8f

Timelineinfo

04/16/2025 🔍
05/20/2025 +34 days 🔍
05/20/2025 +0 days 🔍
12/16/2025 +210 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-37962 (🔍)
GCVE (CVE): GCVE-0-2025-37962
GCVE (VulDB): GCVE-100-309753
CERT Bund: WID-SEC-2025-1114 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 05/20/2025 18:29
Updated: 12/16/2025 22:26
Changes: 05/20/2025 18:29 (59), 05/25/2025 03:55 (2), 08/10/2025 01:17 (7), 09/27/2025 16:29 (1), 12/14/2025 17:52 (1), 12/16/2025 22:26 (11)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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