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Linux Kernel: ptp Drivers May Crash
published 1 year ago
Summary
The Linux kernel's ptp drivers may crash if they don't have an 'enable' callback. This can happen when users interact with the drivers through the command line or system settings. To fix this, the kernel developers have added a default 'enable' callback to prevent crashes.
What to do
- Update linux kernel to version 6.13.3.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Linux | linux | kernel |
>= 6.13.0, < 6.13.3 Fix: upgrade to 6.13.3
|
Original advisory text
ptp: Ensure info->enable callback is always set
In the Linux kernel, the following vulnerability has been resolved:
ptp: Ensure info->enable callback is always set
The ioctl and sysfs handlers unconditionally call the ->enable callback.
Not all drivers implement that callback, leading to NULL dereferences.
Example of affected drivers: ptp_s390.c, ptp_vclock.c and ptp_mock.c.
Instead use a dummy callback if no better was specified by the driver.
ptp: Ensure info->enable callback is always set
The ioctl and sysfs handlers unconditionally call the ->enable callback.
Not all drivers implement that callback, leading to NULL dereferences.
Example of affected drivers: ptp_s390.c, ptp_vclock.c and ptp_mock.c.
Instead use a dummy callback if no better was specified by the driver.
References
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html URL
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html URL
- https://git.kernel.org/stable/c/1334c64a5d1de6666e0c9f984db6745083df1eb4 URL
- https://git.kernel.org/stable/c/5d1041c76de656f9f8d5a192218039a9acf9bd00 URL
- https://git.kernel.org/stable/c/755caf4ee1c615ee5717862e427124370f46b1f3 URL
- https://git.kernel.org/stable/c/81846070cba17125a866e8023c01d3465b153339 URL
- https://git.kernel.org/stable/c/8441aea46445252df5d2eed6deb6d5246fc24002 URL
- https://git.kernel.org/stable/c/9df3a9284f39bfd51a9f72a6a165c79e2aa5066b URL
- https://git.kernel.org/stable/c/fd53aa40e65f518453115b6f56183b0c201db26b URL
- https://git.kernel.org/stable/c/fdc1e72487781dd7705bcbe30878bee7d5d1f3e8 URL
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html URL
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html URL
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21814... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-21814 Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
Timeline
Published27 Feb 2025
Updated16 Jul 2026
First seen16 Jul 2026
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