CVE-2025-39856 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer Dereference5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 94.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 19
Latest updateSep 22

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel6.15 — 6.16.6+1
▶Debianlinux/linux_kernel< 6.16.6-1
▶CVEListV5linux/linux9a369ae3d1431a83589dde57323a04692dd7fc12 — 485302905bada953aadfe063320d73c892a66cbb+2
▶debiandebian/linux< linux 6.16.6-1 (forky)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-5m54-qph5-4wvp: In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev In the↗2025-09-22
▶
OSV
CVE-2025-39856: 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↗2025-09-19
▶

📋Vendor Advisories

2
Red Hat
kernel: net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev↗2025-09-19
▶
Debian
CVE-2025-39856: linux - In the Linux kernel, the following vulnerability has been resolved: net: ethern...↗2025
▶
CVE-2025-39856 — NULL Pointer Dereference in Linux | cvebase