{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38102", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38102", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-03T08:35:12.255Z", "updatedAt": "2026-10-15T21:52:08.219Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify", "summary": "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 \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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "74095bbbb19ca74a0368d857603a2438c88ca86c" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "468aec888f838ce5174b96e0cb4396790d6f60ca" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "b4209e4b778e4e57d0636e1c9fc07a924dbc6043" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "58a90db70aa6616411e5f69d1982d9b1dd97d774" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "6e3af836805ed1d7a699f76ec798626198917aa4" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "00ddc7dad55b7bbb78df80d6e174d0c4764dea0c" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "75b5313c80c39a26d27cbb602f968a05576c36f9" }, { "version": "a1d88436d53a75e950db15834b3d2f8c0c358fdc", "status": "affected", "versionType": "git", "lessThan": "1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.0" }, { "version": "5.4.296", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.240", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.186", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.142", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.94", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.34", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.15.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }