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.
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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
|
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| Linux | Linux | affected |
|
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| Vendors | Products |
|---|---|
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Linux Kernel
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Advisories
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Fixes
Solution
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Workaround
No workaround given by the vendor.
References
History
Wed, 06 May 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-476 |
Wed, 06 May 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | net: ethernet: xscale: Check for PTP support properly | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-05-06T11:27:48.097Z
Reserved: 2026-05-01T14:12:55.991Z
Link: CVE-2026-43173
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-05-06T12:16:35.707
Modified: 2026-05-06T13:07:51.607
Link: CVE-2026-43173
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-05-06T16:30:06Z
Weaknesses