CVE-2025-38102 (GCVE-0-2025-38102)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2026-05-11 21:21
VLAI?
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: VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify During our test, it is found that a warning can be trigger in try_grab_folio as follow: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1678 at mm/gup.c:147 try_grab_folio+0x106/0x130 Modules linked in: CPU: 0 UID: 0 PID: 1678 Comm: syz.3.31 Not tainted 6.15.0-rc5 #163 PREEMPT(undef) RIP: 0010:try_grab_folio+0x106/0x130 Call Trace: <TASK> follow_huge_pmd+0x240/0x8e0 follow_pmd_mask.constprop.0.isra.0+0x40b/0x5c0 follow_pud_mask.constprop.0.isra.0+0x14a/0x170 follow_page_mask+0x1c2/0x1f0 __get_user_pages+0x176/0x950 __gup_longterm_locked+0x15b/0x1060 ? gup_fast+0x120/0x1f0 gup_fast_fallback+0x17e/0x230 get_user_pages_fast+0x5f/0x80 vmci_host_unlocked_ioctl+0x21c/0xf80 RIP: 0033:0x54d2cd ---[ end trace 0000000000000000 ]--- Digging into the source, context->notify_page may init by get_user_pages_fast and can be seen in vmci_ctx_unset_notify which will try to put_page. However get_user_pages_fast is not finished here and lead to following try_grab_folio warning. The race condition is shown as follow: cpu0 cpu1 vmci_host_do_set_notify vmci_host_setup_notify get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); lockless_pages_from_mm gup_pgd_range gup_huge_pmd // update &context->notify_page vmci_host_do_set_notify vmci_ctx_unset_notify notify_page = context->notify_page; if (notify_page) put_page(notify_page); // page is freed __gup_longterm_locked __get_user_pages follow_trans_huge_pmd try_grab_folio // warn here To slove this, use local variable page to make notify_page can be seen after finish get_user_pages_fast.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 74095bbbb19ca74a0368d857603a2438c88ca86c (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 468aec888f838ce5174b96e0cb4396790d6f60ca (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < b4209e4b778e4e57d0636e1c9fc07a924dbc6043 (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 58a90db70aa6616411e5f69d1982d9b1dd97d774 (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 6e3af836805ed1d7a699f76ec798626198917aa4 (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 00ddc7dad55b7bbb78df80d6e174d0c4764dea0c (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 75b5313c80c39a26d27cbb602f968a05576c36f9 (git)
Affected: a1d88436d53a75e950db15834b3d2f8c0c358fdc , < 1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4 (git)
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Linux Linux Affected: 4.0
Unaffected: 0 , < 4.0 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          "value": "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   \u003cTASK\u003e\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-\u003enotify_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, \u0026context-\u003enotify_page);\nlockless_pages_from_mm\ngup_pgd_range\ngup_huge_pmd  // update \u0026context-\u003enotify_page\n\t\t\tvmci_host_do_set_notify\n\t\t\tvmci_ctx_unset_notify\n\t\t\tnotify_page = context-\u003enotify_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."
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      "title": "VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify",
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    "cveId": "CVE-2025-38102",
    "datePublished": "2025-07-03T08:35:12.255Z",
    "dateReserved": "2025-04-16T04:51:23.985Z",
    "dateUpdated": "2026-05-11T21:21:17.994Z",
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    "epss": {
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      "date": "2026-05-21",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38102\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:23.710\",\"lastModified\":\"2025-12-16T17:10:36.717\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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   \u003cTASK\u003e\\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-\u003enotify_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, \u0026context-\u003enotify_page);\\nlockless_pages_from_mm\\ngup_pgd_range\\ngup_huge_pmd  // update \u0026context-\u003enotify_page\\n\\t\\t\\tvmci_host_do_set_notify\\n\\t\\t\\tvmci_ctx_unset_notify\\n\\t\\t\\tnotify_page = context-\u003enotify_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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: VMCI: corregir la ejecuci\u00f3n entre vmci_host_setup_notify y vmci_ctx_unset_notify Durante nuestra prueba, se encontr\u00f3 que se puede activar una advertencia en try_grab_folio de la siguiente manera: ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 0 PID: 1678 en mm/gup.c:147 try_grab_folio+0x106/0x130 M\u00f3dulos vinculados: CPU: 0 UID: 0 PID: 1678 Comm: syz.3.31 No contaminado 6.15.0-rc5 #163 PREEMPT(undef) RIP: 0010:try_grab_folio+0x106/0x130 Rastreo de llamadas:  follow_huge_pmd+0x240/0x8e0 follow_pmd_mask.constprop.0.isra.0+0x40b/0x5c0 follow_pud_mask.constprop.0.isra.0+0x14a/0x170 follow_page_mask+0x1c2/0x1f0 __get_user_pages+0x176/0x950 __gup_longterm_locked+0x15b/0x1060 ? gup_fast+0x120/0x1f0 gup_fast_fallback+0x17e/0x230 get_user_pages_fast+0x5f/0x80 vmci_host_unlocked_ioctl+0x21c/0xf80 RIP: 0033:0x54d2cd ---[ fin del seguimiento 000000000000000 ]--- Al analizar el c\u00f3digo fuente, es posible que context-\u0026gt;notify_page se inicialice mediante get_user_pages_fast, lo que se puede observar en vmci_ctx_unset_notify, que intentar\u00e1 ejecutar put_page. Sin embargo, get_user_pages_fast no ha finalizado y genera la siguiente advertencia try_grab_folio. La condici\u00f3n de ejecuci\u00f3n se muestra de la siguiente manera: cpu0 cpu1 vmci_host_do_set_notify vmci_host_setup_notify get_user_pages_fast(uva, 1, FOLL_WRITE, \u0026amp;context-\u0026gt;notify_page); lockless_pages_from_mm gup_pgd_range gup_huge_pmd // actualizar \u0026amp;context-\u0026gt;notify_page vmci_host_do_set_notify vmci_ctx_unset_notify notify_page = context-\u0026gt;notify_page; if (notify_page) put_page(notify_page); // la p\u00e1gina est\u00e1 liberada __gup_longterm_locked __get_user_pages follow_trans_huge_pmd try_grab_folio // advertir aqu\u00ed Para solucionar esto, use la variable local page para hacer que notify_page se pueda ver despu\u00e9s de finalizar get_user_pages_fast.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.0\",\"versionEndExcluding\":\"5.4.296\",\"matchCriteriaId\":\"276E592C-F727-4256-8D40-ADA7F48345E7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.240\",\"matchCriteriaId\":\"0E73A49A-F9B2-470F-91B2-6FAB6239BDB6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.186\",\"matchCriteriaId\":\"D96F2C0D-0D4A-4658-AD34-D8A626EA422D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.142\",\"matchCriteriaId\":\"459B4E94-FE0E-434D-B782-95E3A5FFC6B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.94\",\"matchCriteriaId\":\"304E3F01-7D7A-4908-994E-7F95C5C00B06\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.34\",\"matchCriteriaId\":\"4FFA54AA-CDFE-4591-BD07-72813D0948F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.3\",\"matchCriteriaId\":\"0541C761-BD5E-4C1A-8432-83B375D7EB92\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/00ddc7dad55b7bbb78df80d6e174d0c4764dea0c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/468aec888f838ce5174b96e0cb4396790d6f60ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/58a90db70aa6616411e5f69d1982d9b1dd97d774\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6e3af836805ed1d7a699f76ec798626198917aa4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/74095bbbb19ca74a0368d857603a2438c88ca86c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/75b5313c80c39a26d27cbb602f968a05576c36f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b4209e4b778e4e57d0636e1c9fc07a924dbc6043\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"Mailing List\"]}]}}"
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.