CVE-2025-39856 Details
Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev In the TX completion packet stage of TI SoCs with CPSW2G instance, which has single external ethernet port, ndev is accessed without being initialized if no TX packets have been processed. It results into null pointer dereference, causing kernel to crash. Fix this by having a check on the number of TX packets which have been processed.
A null pointer dereference vulnerability has been identified in the Linux kernel's handling of Ethernet transmission completion packets on Texas Instruments (TI) AM65 system-on-chips (SoCs) with a CPSW2G instance. This issue arises in the TX completion stage when the network device (ndev) is accessed without proper initialization, particularly if no TX packets have been processed. The uninitialized access leads to a kernel crash. The vulnerability affects the Linux kernel stable tree.
The vulnerability has been addressed in the Linux kernel stable tree. Users can download the patched version from the Linux kernel Git repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/485302905bada953aadfe063320d73c892a66cbb | kernel.org | Patch |
| https://git.kernel.org/stable/c/a6099f263e1f408bcc7913c9df24b0677164fc5d | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
| CWE-476 | NULL Pointer Dereference | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.15, < 6.16.6 6.17 rc1 6.17 rc2 6.17 rc3 6.17 rc4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 14, 2026 | CVE Modified | CISA-ADP |
| Dec 11, 2025 | Initial Analysis | [email protected] |
| Sep 19, 2025 | New CVE Received | kernel.org |