| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37916: pds_core: remove write-after-free of client_id |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| pds_core: remove write-after-free of client_id |
| |
| A use-after-free error popped up in stress testing: |
| |
| [Mon Apr 21 21:21:33 2025] BUG: KFENCE: use-after-free write in pdsc_auxbus_dev_del+0xef/0x160 [pds_core] |
| [Mon Apr 21 21:21:33 2025] Use-after-free write at 0x000000007013ecd1 (in kfence-#47): |
| [Mon Apr 21 21:21:33 2025] pdsc_auxbus_dev_del+0xef/0x160 [pds_core] |
| [Mon Apr 21 21:21:33 2025] pdsc_remove+0xc0/0x1b0 [pds_core] |
| [Mon Apr 21 21:21:33 2025] pci_device_remove+0x24/0x70 |
| [Mon Apr 21 21:21:33 2025] device_release_driver_internal+0x11f/0x180 |
| [Mon Apr 21 21:21:33 2025] driver_detach+0x45/0x80 |
| [Mon Apr 21 21:21:33 2025] bus_remove_driver+0x83/0xe0 |
| [Mon Apr 21 21:21:33 2025] pci_unregister_driver+0x1a/0x80 |
| |
| The actual device uninit usually happens on a separate thread |
| scheduled after this code runs, but there is no guarantee of order |
| of thread execution, so this could be a problem. There's no |
| actual need to clear the client_id at this point, so simply |
| remove the offending code. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37916 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 10659034c622738bc1bfab8a76fc576c52d5acce and fixed in 6.6.90 with commit 9b467c5bcdb45a41d2a49fbb9ffca73d1380e99b |
| Issue introduced in 6.4 with commit 10659034c622738bc1bfab8a76fc576c52d5acce and fixed in 6.12.28 with commit c649b9653ed09196e91d3f4b16b679041b3c42e6 |
| Issue introduced in 6.4 with commit 10659034c622738bc1bfab8a76fc576c52d5acce and fixed in 6.14.6 with commit 26dc701021302f11c8350108321d11763bd81dfe |
| Issue introduced in 6.4 with commit 10659034c622738bc1bfab8a76fc576c52d5acce and fixed in 6.15 with commit dfd76010f8e821b66116dec3c7d90dd2403d1396 |
| |
| 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-2025-37916 |
| 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/amd/pds_core/auxbus.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/9b467c5bcdb45a41d2a49fbb9ffca73d1380e99b |
| https://git.kernel.org/stable/c/c649b9653ed09196e91d3f4b16b679041b3c42e6 |
| https://git.kernel.org/stable/c/26dc701021302f11c8350108321d11763bd81dfe |
| https://git.kernel.org/stable/c/dfd76010f8e821b66116dec3c7d90dd2403d1396 |
