| 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-2024-42107: ice: Don't process extts if PTP is disabled |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ice: Don't process extts if PTP is disabled |
| |
| The ice_ptp_extts_event() function can race with ice_ptp_release() and |
| result in a NULL pointer dereference which leads to a kernel panic. |
| |
| Panic occurs because the ice_ptp_extts_event() function calls |
| ptp_clock_event() with a NULL pointer. The ice driver has already |
| released the PTP clock by the time the interrupt for the next external |
| timestamp event occurs. |
| |
| To fix this, modify the ice_ptp_extts_event() function to check the |
| PTP state and bail early if PTP is not ready. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42107 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 172db5f91d5f7b91670c68a7547798b0b5374158 and fixed in 6.9.9 with commit 1c4e524811918600683b1ea87a5e0fc2db64fa9b |
| Issue introduced in 5.14 with commit 172db5f91d5f7b91670c68a7547798b0b5374158 and fixed in 6.10 with commit 996422e3230e41468f652d754fefd1bdbcd4604e |
| |
| 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-2024-42107 |
| 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/net/ethernet/intel/ice/ice_ptp.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/1c4e524811918600683b1ea87a5e0fc2db64fa9b |
| https://git.kernel.org/stable/c/996422e3230e41468f652d754fefd1bdbcd4604e |
