{"id":"CVE-2025-38102","revision":"4c51268ed4c4408b88db2b6f321c8036","records":[{"revision":"4c51268ed4c4408b88db2b6f321c8036","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38102","aliases":[],"title":"VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nVMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify\n\nDuring our test, it is found that a warning can be trigger in try_grab_folio\nas follow:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 0 PID: 1678 at mm/gup.c:147 try_grab_folio+0x106/0x130\n  Modules linked in:\n  CPU: 0 UID: 0 PID: 1678 Comm: syz.3.31 Not tainted 6.15.0-rc5 #163 PREEMPT(undef)\n  RIP: 0010:try_grab_folio+0x106/0x130\n  Call Trace:\n   <TASK>\n   follow_huge_pmd+0x240/0x8e0\n   follow_pmd_mask.constprop.0.isra.0+0x40b/0x5c0\n   follow_pud_mask.constprop.0.isra.0+0x14a/0x170\n   follow_page_mask+0x1c2/0x1f0\n   __get_user_pages+0x176/0x950\n   __gup_longterm_locked+0x15b/0x1060\n   ? gup_fast+0x120/0x1f0\n   gup_fast_fallback+0x17e/0x230\n   get_user_pages_fast+0x5f/0x80\n   vmci_host_unlocked_ioctl+0x21c/0xf80\n  RIP: 0033:0x54d2cd\n  ---[ end trace 0000000000000000 ]---\n\nDigging into the source, context->notify_page may init by get_user_pages_fast\nand can be seen in vmci_ctx_unset_notify which will try to put_page. However\nget_user_pages_fast is not finished here and lead to following\ntry_grab_folio warning. The race condition is shown as follow:\n\ncpu0\t\t\tcpu1\nvmci_host_do_set_notify\nvmci_host_setup_notify\nget_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page);\nlockless_pages_from_mm\ngup_pgd_range\ngup_huge_pmd  // update &context->notify_page\n\t\t\tvmci_host_do_set_notify\n\t\t\tvmci_ctx_unset_notify\n\t\t\tnotify_page = context->notify_page;\n\t\t\tif (notify_page)\n\t\t\tput_page(notify_page);\t// page is freed\n__gup_longterm_locked\n__get_user_pages\nfollow_trans_huge_pmd\ntry_grab_folio // warn here\n\nTo slove this, use local variable page to make notify_page can be seen\nafter finish get_user_pages_fast.","state":0,"publishedAt":"2025-07-03T08:35:12.255+00:00","modifiedAt":"2026-10-15T21:52:08.219+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/misc/vmw_vmci/vmci_host.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"74095bbbb19ca74a0368d857603a2438c88ca86c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"468aec888f838ce5174b96e0cb4396790d6f60ca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"b4209e4b778e4e57d0636e1c9fc07a924dbc6043\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"58a90db70aa6616411e5f69d1982d9b1dd97d774\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"6e3af836805ed1d7a699f76ec798626198917aa4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"00ddc7dad55b7bbb78df80d6e174d0c4764dea0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"75b5313c80c39a26d27cbb602f968a05576c36f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a1d88436d53a75e950db15834b3d2f8c0c358fdc\",\n                            \"lessThan\": \"1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4\",\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/misc/vmw_vmci/vmci_host.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.296\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.240\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.186\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.142\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.94\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.34\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.3\",\n                            \"lessThanOrEqual\": \"6.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16\",\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/74095bbbb19ca74a0368d857603a2438c88ca86c","https://git.kernel.org/stable/c/468aec888f838ce5174b96e0cb4396790d6f60ca","https://git.kernel.org/stable/c/b4209e4b778e4e57d0636e1c9fc07a924dbc6043","https://git.kernel.org/stable/c/58a90db70aa6616411e5f69d1982d9b1dd97d774","https://git.kernel.org/stable/c/6e3af836805ed1d7a699f76ec798626198917aa4","https://git.kernel.org/stable/c/00ddc7dad55b7bbb78df80d6e174d0c4764dea0c","https://git.kernel.org/stable/c/75b5313c80c39a26d27cbb602f968a05576c36f9","https://git.kernel.org/stable/c/1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38102","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38102","identifiers":["CVE-2025-38102"]},"retained":false,"historicalAffected":[]}],"coverage":[]}