Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5 can es58x_alloc_rx_urbs allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5. Affected by this vulnerability is the function es58x_alloc_rx_urbs of the component can. Performing a manipulation results in allocation of resources. This vulnerability is cataloged as CVE-2026-23037. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5. This affects the function es58x_alloc_rx_urbs of the component can. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: allow partial RX URB allocation to succeed When es58x_alloc_rx_urbs() fails to allocate the requested number of URBs but succeeds in allocating some, it returns an error code. This causes es58x_open() to return early, skipping the cleanup label 'free_urbs', which leads to the anchored URBs being leaked. As pointed out by maintainer Vincent Mailhol, the driver is designed to handle partial URB allocation gracefully. Therefore, partial allocation should not be treated as a fatal error. Modify es58x_alloc_rx_urbs() to return 0 if at least one URB has been allocated, restoring the intended behavior and preventing the leak in es58x_open().

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-23037 since 01/13/2026. The exploitability is told to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 297503 (Linux Distros Unpatched Vulnerability : CVE-2026-23037), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.122, 6.12.67, 6.18.7 or 6.19-rc6 eliminates this vulnerability. Applying the patch 611e839d2d552416b498ed5593e10670f61fcd4d/ba45e3d6b02c97dbb4578fbae7027fd66f3caa10/6c5124a60989051799037834f0a1a4b428718157/b1979778e98569c1e78c2c7f16bb24d76541ab00 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 (297503), EUVD (EUVD-2026-5057) and CERT Bund (WID-SEC-2026-0280). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Open Source Linux Kernel

Productinfo

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Name

Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297503
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23037

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.122/6.12.67/6.18.7/6.19-rc6
Patch: 611e839d2d552416b498ed5593e10670f61fcd4d/ba45e3d6b02c97dbb4578fbae7027fd66f3caa10/6c5124a60989051799037834f0a1a4b428718157/b1979778e98569c1e78c2c7f16bb24d76541ab00

Timelineinfo

01/13/2026 CVE reserved
01/31/2026 +18 days Advisory disclosed
01/31/2026 +0 days VulDB entry created
06/02/2026 +122 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23037 (🔒)
GCVE (CVE): GCVE-0-2026-23037
GCVE (VulDB): GCVE-100-343629
EUVD: 🔒
CERT Bund: WID-SEC-2026-0280 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/31/2026 15:28
Updated: 06/02/2026 19:21
Changes: 01/31/2026 15:28 (59), 02/01/2026 00:08 (1), 02/01/2026 18:27 (2), 02/03/2026 02:01 (7), 06/02/2026 19:21 (1)
Complete: 🔍
Cache ID: 216::103

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