{"id":"CVE-2025-68800","revision":"afa04f85d52146d3acaa0f7098658083","records":[{"revision":"afa04f85d52146d3acaa0f7098658083","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68800","aliases":[],"title":"mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats\n\nCited commit added a dedicated mutex (instead of RTNL) to protect the\nmulticast route list, so that it will not change while the driver\nperiodically traverses it in order to update the kernel about multicast\nroute stats that were queried from the device.\n\nOne instance of list entry deletion (during route replace) was missed\nand it can result in a use-after-free [1].\n\nFix by acquiring the mutex before deleting the entry from the list and\nreleasing it afterwards.\n\n[1]\nBUG: KASAN: slab-use-after-free in mlxsw_sp_mr_stats_update+0x4a5/0x540 drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c:1006 [mlxsw_spectrum]\nRead of size 8 at addr ffff8881523c2fa8 by task kworker/2:5/22043\n\nCPU: 2 UID: 0 PID: 22043 Comm: kworker/2:5 Not tainted 6.18.0-rc1-custom-g1a3d6d7cd014 #1 PREEMPT(full)\nHardware name: Mellanox Technologies Ltd. MSN2010/SA002610, BIOS 5.6.5 08/24/2017\nWorkqueue: mlxsw_core mlxsw_sp_mr_stats_update [mlxsw_spectrum]\nCall Trace:\n \n dump_stack_lvl+0xba/0x110\n print_report+0x174/0x4f5\n kasan_report+0xdf/0x110\n mlxsw_sp_mr_stats_update+0x4a5/0x540 drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c:1006 [mlxsw_spectrum]\n process_one_work+0x9cc/0x18e0\n worker_thread+0x5df/0xe40\n kthread+0x3b8/0x730\n ret_from_fork+0x3e9/0x560\n ret_from_fork_asm+0x1a/0x30\n \n\nAllocated by task 29933:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x8f/0xa0\n mlxsw_sp_mr_route_add+0xd8/0x4770 [mlxsw_spectrum]\n mlxsw_sp_router_fibmr_event_work+0x371/0xad0 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:7965 [mlxsw_spectrum]\n process_one_work+0x9cc/0x18e0\n worker_thread+0x5df/0xe40\n kthread+0x3b8/0x730\n ret_from_fork+0x3e9/0x560\n ret_from_fork_asm+0x1a/0x30\n\nFreed by task 29933:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n __kasan_save_free_info+0x3b/0x70\n __kasan_slab_free+0x43/0x70\n kfree+0x14e/0x700\n mlxsw_sp_mr_route_add+0x2dea/0x4770 drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c:444 [mlxsw_spectrum]\n mlxsw_sp_router_fibmr_event_work+0x371/0xad0 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:7965 [mlxsw_spectrum]\n process_one_work+0x9cc/0x18e0\n worker_thread+0x5df/0xe40\n kthread+0x3b8/0x730\n ret_from_fork+0x3e9/0x560\n ret_from_fork_asm+0x1a/0x30","state":0,"publishedAt":"2026-01-13T15:29:09.688+00:00","modifiedAt":"2026-10-19T18:05:07.829+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"b957366f5611bbaba03dd10ef861283347ddcc88\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"6e367c361a523a4b54fe618215c64a0ee189caf0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"37ca08b35a27ce8fd8e74dd3fd2ae21c23b63b73\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"5f2831fc593c2b2efbff7dd0dd7441cec76adcd5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"216afc198484fde110ebeafc017992266f4596ce\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"4049a6ace209f4ed150429f86ae796d7d6a4c22b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f38656d067257cc43b652958dd154e1ab0773701\",\n \"lessThan\": \"8ac1dacec458f55f871f7153242ed6ab60373b90\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.7\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.7\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.248\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.198\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.160\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.120\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.64\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.3\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b957366f5611bbaba03dd10ef861283347ddcc88","https://git.kernel.org/stable/c/6e367c361a523a4b54fe618215c64a0ee189caf0","https://git.kernel.org/stable/c/37ca08b35a27ce8fd8e74dd3fd2ae21c23b63b73","https://git.kernel.org/stable/c/5f2831fc593c2b2efbff7dd0dd7441cec76adcd5","https://git.kernel.org/stable/c/216afc198484fde110ebeafc017992266f4596ce","https://git.kernel.org/stable/c/4049a6ace209f4ed150429f86ae796d7d6a4c22b","https://git.kernel.org/stable/c/8ac1dacec458f55f871f7153242ed6ab60373b90"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68800","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68800","identifiers":["CVE-2025-68800"]},"retained":false,"historicalAffected":[]}],"coverage":[]}