CVE-2025-38102— VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify
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I. Basic Information for CVE-2025-38102
Vulnerability Information
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Vulnerability Title
VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于VMCI中vmci_host_setup_notify和vmci_ctx_unset_notify竞争条件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-38102
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Same Patch Batch · Linux · 2025-07-03 · 78 CVEs total
| CVE-2025-38129 | page_pool: Fix use-after-free in page_pool_recycle_in_ring | |
| CVE-2025-38128 | Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands | |
| CVE-2025-38114 | e1000: Move cancel_work_sync to avoid deadlock | |
| CVE-2025-38127 | ice: fix Tx scheduler error handling in XDP callback | |
| CVE-2025-38125 | net: stmmac: make sure that ptp_rate is not 0 before configuring EST | |
| CVE-2025-38126 | net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping | |
| CVE-2025-38130 | drm/connector: only call HDMI audio helper plugged cb if non-null | |
| CVE-2025-38131 | coresight: prevent deactivate active config while enabling the config | |
| CVE-2025-38132 | coresight: holding cscfg_csdev_lock while removing cscfg from csdev | |
| CVE-2025-38133 | iio: adc: ad4851: fix ad4858 chan pointer handling | |
| CVE-2025-38124 | net: fix udp gso skb_segment after pull from frag_list | |
| CVE-2025-38122 | gve: add missing NULL check for gve_alloc_pending_packet() in TX DQO | |
| CVE-2025-38123 | net: wwan: t7xx: Fix napi rx poll issue | |
| CVE-2025-38121 | wifi: iwlwifi: mld: avoid panic on init failure | |
| CVE-2025-38119 | scsi: core: ufs: Fix a hang in the error handler | |
| CVE-2025-38120 | netfilter: nf_set_pipapo_avx2: fix initial map fill | |
| CVE-2025-38118 | Bluetooth: MGMT: Fix UAF on mgmt_remove_adv_monitor_complete | |
| CVE-2025-38117 | Bluetooth: MGMT: Protect mgmt_pending list with its own lock | |
| CVE-2025-38115 | net_sched: sch_sfq: fix a potential crash on gso_skb handling | |
| CVE-2025-38116 | wifi: ath12k: fix uaf in ath12k_core_init() |
Showing top 20 of 78 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-38102
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