| 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-2025-37955: virtio-net: free xsk_buffs on error in virtnet_xsk_pool_enable() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| virtio-net: free xsk_buffs on error in virtnet_xsk_pool_enable() |
| |
| The selftests added to our CI by Bui Quang Minh recently reveals |
| that there is a mem leak on the error path of virtnet_xsk_pool_enable(): |
| |
| unreferenced object 0xffff88800a68a000 (size 2048): |
| comm "xdp_helper", pid 318, jiffies 4294692778 |
| hex dump (first 32 bytes): |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| backtrace (crc 0): |
| __kvmalloc_node_noprof+0x402/0x570 |
| virtnet_xsk_pool_enable+0x293/0x6a0 (drivers/net/virtio_net.c:5882) |
| xp_assign_dev+0x369/0x670 (net/xdp/xsk_buff_pool.c:226) |
| xsk_bind+0x6a5/0x1ae0 |
| __sys_bind+0x15e/0x230 |
| __x64_sys_bind+0x72/0xb0 |
| do_syscall_64+0xc1/0x1d0 |
| entry_SYSCALL_64_after_hwframe+0x77/0x7f |
| |
| The Linux kernel CVE team has assigned CVE-2025-37955 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.11 with commit e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 and fixed in 6.12.29 with commit 94a6f6c204abb2b2dcd2ce287536cc924469cfb5 |
| Issue introduced in 6.11 with commit e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 and fixed in 6.14.7 with commit ba6917810bb4a5a32661fa941717399052b3f0d9 |
| Issue introduced in 6.11 with commit e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 and fixed in 6.15 with commit 4397684a292a71fbc1e815c3e283f7490ddce5ae |
| |
| 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-2025-37955 |
| 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/virtio_net.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/94a6f6c204abb2b2dcd2ce287536cc924469cfb5 |
| https://git.kernel.org/stable/c/ba6917810bb4a5a32661fa941717399052b3f0d9 |
| https://git.kernel.org/stable/c/4397684a292a71fbc1e815c3e283f7490ddce5ae |
