Linux Kernel up to 6.18.7 wifi dma_free_coherent allocation of resources

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

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.7. It has been rated as critical. Affected by this issue is the function dma_free_coherent of the component wifi. Performing a manipulation results in allocation of resources. This vulnerability is reported as CVE-2026-23133. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.18.7. This affects the function dma_free_coherent of the component wifi. 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. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: fix dma_free_coherent() pointer dma_alloc_coherent() allocates a DMA mapped buffer and stores the addresses in XXX_unaligned fields. Those should be reused when freeing the buffer rather than the aligned addresses.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-23133 since 01/13/2026. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 299182 (Linux Distros Unpatched Vulnerability : CVE-2026-23133), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68 or 6.18.8 eliminates this vulnerability. Applying the patch e2dda298ef809aa201ea7c0904c4d064f6c497cb/fc8da65f9fe1bc6802f8240b342cfff4f5c7e841/b0ad924332a96550a84b8c0ae5483e7042d65fa9/1928851334ecfd6e0d663121ab69ac639d4217a6/5d6fa4d2c9799c09389588da5118a72d97d87e92/07f363f305793baecad41816f73056252f3df61e/9282a1e171ad8d2205067e8ec3bbe4e3cef4f29f 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 vulnerability database at Tenable (299182). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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

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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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299182
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23133

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.249/5.15.199/6.1.162/6.6.122/6.12.68/6.18.8
Patch: e2dda298ef809aa201ea7c0904c4d064f6c497cb/fc8da65f9fe1bc6802f8240b342cfff4f5c7e841/b0ad924332a96550a84b8c0ae5483e7042d65fa9/1928851334ecfd6e0d663121ab69ac639d4217a6/5d6fa4d2c9799c09389588da5118a72d97d87e92/07f363f305793baecad41816f73056252f3df61e/9282a1e171ad8d2205067e8ec3bbe4e3cef4f29f

Timelineinfo

01/13/2026 CVE reserved
02/14/2026 +32 days Advisory disclosed
02/14/2026 +0 days VulDB entry created
03/18/2026 +32 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23133 (🔒)
GCVE (CVE): GCVE-0-2026-23133
GCVE (VulDB): GCVE-100-346017

Entryinfo

Created: 02/14/2026 17:51
Updated: 03/18/2026 02:15
Changes: 02/14/2026 17:51 (59), 02/16/2026 20:02 (2), 02/19/2026 09:18 (1), 03/18/2026 02:15 (10)
Complete: 🔍
Cache ID: 216::103

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

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