| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21814: ptp: Ensure info->enable callback is always set |
| |
| Description |
| =========== |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21814 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 5.4.291 with commit fdc1e72487781dd7705bcbe30878bee7d5d1f3e8 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 5.10.235 with commit 9df3a9284f39bfd51a9f72a6a165c79e2aa5066b |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 5.15.179 with commit 1334c64a5d1de6666e0c9f984db6745083df1eb4 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 6.1.129 with commit 5d1041c76de656f9f8d5a192218039a9acf9bd00 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 6.6.78 with commit 81846070cba17125a866e8023c01d3465b153339 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 6.12.14 with commit 8441aea46445252df5d2eed6deb6d5246fc24002 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 6.13.3 with commit 755caf4ee1c615ee5717862e427124370f46b1f3 |
| Issue introduced in 3.0 with commit d94ba80ebbea17f036cecb104398fbcd788aa742 and fixed in 6.14 with commit fd53aa40e65f518453115b6f56183b0c201db26b |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-21814 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/ptp/ptp_clock.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/fdc1e72487781dd7705bcbe30878bee7d5d1f3e8 |
| https://git.kernel.org/stable/c/9df3a9284f39bfd51a9f72a6a165c79e2aa5066b |
| https://git.kernel.org/stable/c/1334c64a5d1de6666e0c9f984db6745083df1eb4 |
| https://git.kernel.org/stable/c/5d1041c76de656f9f8d5a192218039a9acf9bd00 |
| https://git.kernel.org/stable/c/81846070cba17125a866e8023c01d3465b153339 |
| https://git.kernel.org/stable/c/8441aea46445252df5d2eed6deb6d5246fc24002 |
| https://git.kernel.org/stable/c/755caf4ee1c615ee5717862e427124370f46b1f3 |
| https://git.kernel.org/stable/c/fd53aa40e65f518453115b6f56183b0c201db26b |
