CVE-2025-40153 Details
Description
In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: avoid soft lockup when mprotect to large memory area When calling mprotect() to a large hugetlb memory area in our customer's workload (~300GB hugetlb memory), soft lockup was observed: watchdog: BUG: soft lockup - CPU#98 stuck for 23s! [t2_new_sysv:126916] CPU: 98 PID: 126916 Comm: t2_new_sysv Kdump: loaded Not tainted 6.17-rc7 Hardware name: GIGACOMPUTING R2A3-T40-AAV1/Jefferson CIO, BIOS 5.4.4.1 07/15/2025 pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mte_clear_page_tags+0x14/0x24 lr : mte_sync_tags+0x1c0/0x240 sp : ffff80003150bb80 x29: ffff80003150bb80 x28: ffff00739e9705a8 x27: 0000ffd2d6a00000 x26: 0000ff8e4bc00000 x25: 00e80046cde00f45 x24: 0000000000022458 x23: 0000000000000000 x22: 0000000000000004 x21: 000000011b380000 x20: ffff000000000000 x19: 000000011b379f40 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc875e0aa5e2c x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : fffffc01ce7a5c00 x4 : 00000000046cde00 x3 : fffffc0000000000 x2 : 0000000000000004 x1 : 0000000000000040 x0 : ffff0046cde7c000 Call trace: mte_clear_page_tags+0x14/0x24 set_huge_pte_at+0x25c/0x280 hugetlb_change_protection+0x220/0x430 change_protection+0x5c/0x8c mprotect_fixup+0x10c/0x294 do_mprotect_pkey.constprop.0+0x2e0/0x3d4 __arm64_sys_mprotect+0x24/0x44 invoke_syscall+0x50/0x160 el0_svc_common+0x48/0x144 do_el0_svc+0x30/0xe0 el0_svc+0x30/0xf0 el0t_64_sync_handler+0xc4/0x148 el0t_64_sync+0x1a4/0x1a8 Soft lockup is not triggered with THP or base page because there is cond_resched() called for each PMD size. Although the soft lockup was triggered by MTE, it should be not MTE specific. The other processing which takes long time in the loop may trigger soft lockup too. So add cond_resched() for hugetlb to avoid soft lockup.
A vulnerability in the Linux kernel's handling of hugetlb memory areas can lead to a soft lockup. This issue occurs when the mprotect() system call is applied to large hugetlb memory regions, approximately 300GB, causing the CPU to become unresponsive for an extended period. The problem has been observed in Linux kernel version 6.17-rc7.
The vulnerability has been addressed in the Linux kernel by adding a conditional reschedule call for hugetlb memory areas during the protection change process. Users can upgrade to the latest version of the Linux kernel where this fix is applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 12, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/30498c44c2a0b20f6833ed7d8fc3df901507f760 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/4975c975ed9457a77953a26aeef85fdba7cf5498 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/547e123e9d342a44c756446640ed847a8aeec611 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/5783485ab2be06be5312b26c8793526edc09123d | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/957faf9582f92bb2be8ebe4ab6aa1c2bc71d9859 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/964598e6f70a1be9fe675280bf16b4f96b0a6809 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/c6096f3947f68f96defedb8764b3b1ca4cf3469f | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/f52ce0ea90c83a28904c7cc203a70e6434adfecb | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | >= 6.17-rc7, < 6.17-rc7 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Nov 12, 2025 | New CVE Received | kernel.org |