CVE-2026-43173

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43173
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: xscale: Check for PTP support properly In ixp4xx_get_ts_info() ixp46x_ptp_find() is called unconditionally despite this feature only existing on ixp46x, leading to the following splat from tcpdump: root@OpenWrt:~# tcpdump -vv -X -i eth0 (...) Unable to handle kernel NULL pointer dereference at virtual address 00000238 when read (...) Call trace: ptp_clock_index from ixp46x_ptp_find+0x1c/0x38 ixp46x_ptp_find from ixp4xx_get_ts_info+0x4c/0x64 ixp4xx_get_ts_info from __ethtool_get_ts_info+0x90/0x108 __ethtool_get_ts_info from __dev_ethtool+0xa00/0x2648 __dev_ethtool from dev_ethtool+0x160/0x234 dev_ethtool from dev_ioctl+0x2cc/0x460 dev_ioctl from sock_ioctl+0x1ec/0x524 sock_ioctl from sys_ioctl+0x51c/0xa94 sys_ioctl from ret_fast_syscall+0x0/0x44 (...) Segmentation fault Check for ixp46x in ixp46x_ptp_find() before trying to set up PTP to avoid this. To avoid altering the returned error code from ixp4xx_hwtstamp_set() which before this patch was -EOPNOTSUPP, we return -EOPNOTSUPP from ixp4xx_hwtstamp_set() if ixp46x_ptp_find() fails no matter the error code. The helper function ixp46x_ptp_find() helper returns -ENODEV.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5 Patch
https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e Patch
https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942 Patch
https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae Patch
https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
History

01 Jun 2026, 17:17

Type Values Removed Values Added
References
  • {'url': 'https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4', 'tags': ['Patch'], 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}
  • {'url': 'https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b', 'tags': ['Patch'], 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}

12 May 2026, 20:01

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4 - () https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4 - Patch
References () https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5 - () https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5 - Patch
References () https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e - () https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e - Patch
References () https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942 - () https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942 - Patch
References () https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b - () https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b - Patch
References () https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae - () https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae - Patch
References () https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c - () https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c - Patch
First Time Linux linux Kernel
Linux
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

06 May 2026, 12:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-06 12:16

Updated : 2026-06-01 17:17

NVD link : CVE-2026-43173

Mitre link : CVE-2026-43173

CVE.ORG link : CVE-2026-43173

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference