Linux Kernel up to 6.17.9 net knav_dma.h denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.17.9. It has been declared as critical. The affected element is an unknown function of the file include/linux/soc/ti/knav_dma.h of the component net. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2025-68220. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17.9. It has been classified as critical. Affected is some unknown processing of the file include/linux/soc/ti/knav_dma.h of the component net. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: netcp: Standardize knav_dma_open_channel to return NULL on error Make knav_dma_open_channel consistently return NULL on error instead of ERR_PTR. Currently the header include/linux/soc/ti/knav_dma.h returns NULL when the driver is disabled, but the driver implementation does not even return NULL or ERR_PTR on failure, causing inconsistency in the users. This results in a crash in netcp_free_navigator_resources as followed (trimmed): Unhandled fault: alignment exception (0x221) at 0xfffffff2 [fffffff2] *pgd=80000800207003, *pmd=82ffda003, *pte=00000000 Internal error: : 221 [#1] SMP ARM Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-rc7 #1 NONE Hardware name: Keystone PC is at knav_dma_close_channel+0x30/0x19c LR is at netcp_free_navigator_resources+0x2c/0x28c [... TRIM...] Call trace: knav_dma_close_channel from netcp_free_navigator_resources+0x2c/0x28c netcp_free_navigator_resources from netcp_ndo_open+0x430/0x46c netcp_ndo_open from __dev_open+0x114/0x29c __dev_open from __dev_change_flags+0x190/0x208 __dev_change_flags from netif_change_flags+0x1c/0x58 netif_change_flags from dev_change_flags+0x38/0xa0 dev_change_flags from ip_auto_config+0x2c4/0x11f0 ip_auto_config from do_one_initcall+0x58/0x200 do_one_initcall from kernel_init_freeable+0x1cc/0x238 kernel_init_freeable from kernel_init+0x1c/0x12c kernel_init from ret_from_fork+0x14/0x38 [... TRIM...] Standardize the error handling by making the function return NULL on all error conditions. The API is used in just the netcp_core.c so the impact is limited. Note, this change, in effect reverts commit 5b6cb43b4d62 ("net: ethernet: ti: netcp_core: return error while dma channel open issue"), but provides a less error prone implementation.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-68220 since 12/16/2025. The exploitability is told to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 302766 (Ubuntu 24.04 LTS / 25.10 : Linux kernel vulnerabilities (USN-8094-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.118, 6.12.60 or 6.17.10 eliminates this vulnerability. Applying the patch af6b10a13fc0aee37df4a8292414cc055c263fa3/8427218ecbd7f8559c37972e66cb0fa06e82353b/3afeb909c3e2e0eb19b1e20506196e5f2d9c2259/2572c358ee434ce4b994472cceeb4043cbff5bc5/952637c5b9be64539cd0e13ef88db71a1df46373/fbb53727ca789a8d27052aab4b77ca9e2a0fae2b/f9608637ecc165d7d6341df105aee44691461fb9/90a88306eb874fe4bbdd860e6c9787f5bbc588b5 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 (302766) and CERT Bund (WID-SEC-2025-2868). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: 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: 302766
Nessus Name: Ubuntu 24.04 LTS / 25.10 : Linux kernel vulnerabilities (USN-8094-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.302/5.10.247/5.15.197/6.1.159/6.6.118/6.12.60/6.17.10
Patch: af6b10a13fc0aee37df4a8292414cc055c263fa3/8427218ecbd7f8559c37972e66cb0fa06e82353b/3afeb909c3e2e0eb19b1e20506196e5f2d9c2259/2572c358ee434ce4b994472cceeb4043cbff5bc5/952637c5b9be64539cd0e13ef88db71a1df46373/fbb53727ca789a8d27052aab4b77ca9e2a0fae2b/f9608637ecc165d7d6341df105aee44691461fb9/90a88306eb874fe4bbdd860e6c9787f5bbc588b5

Timelineinfo

12/16/2025 Advisory disclosed
12/16/2025 +0 days CVE reserved
12/16/2025 +0 days VulDB entry created
03/18/2026 +92 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68220 (🔒)
GCVE (CVE): GCVE-0-2025-68220
GCVE (VulDB): GCVE-100-336804
CERT Bund: WID-SEC-2025-2868 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/16/2025 16:10
Updated: 03/18/2026 06:10
Changes: 12/16/2025 16:10 (59), 01/20/2026 01:44 (7), 02/03/2026 08:45 (1), 02/21/2026 15:14 (1), 03/18/2026 06:10 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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