CVE-2025-38102VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 74095bbbb19ca74a0368d857603a2438c88ca86c; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 468aec888f838ce5174b96e0cb4396790d6f60ca; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before b4209e4b778e4e57d0636e1c9fc07a924dbc6043; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 58a90db70aa6616411e5f69d1982d9b1dd97d774; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 6e3af836805ed1d7a699f76ec798626198917aa4; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 00ddc7dad55b7bbb78df80d6e174d0c4764dea0c; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 75b5313c80c39a26d27cbb602f968a05576c36f9; from a1d88436d53a75e950db15834b3d2f8c0c358fdc before 1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.0 before 5.4.296; from 5.5 before 5.10.240; from 5.11 before 5.15.186; from 5.16 before 6.1.142; from 6.2 before 6.6.94; from 6.7 before 6.12.34; from 6.13 before 6.15.3 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/74095bbbb19ca74a0368d857603a2438c88ca86cpatch
- https://git.kernel.org/stable/c/468aec888f838ce5174b96e0cb4396790d6f60capatch
- https://git.kernel.org/stable/c/b4209e4b778e4e57d0636e1c9fc07a924dbc6043patch
- https://git.kernel.org/stable/c/58a90db70aa6616411e5f69d1982d9b1dd97d774patch
- https://git.kernel.org/stable/c/6e3af836805ed1d7a699f76ec798626198917aa4patch
- https://git.kernel.org/stable/c/00ddc7dad55b7bbb78df80d6e174d0c4764dea0cpatch
- https://git.kernel.org/stable/c/75b5313c80c39a26d27cbb602f968a05576c36f9patch
- https://git.kernel.org/stable/c/1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlmailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.