cbcvebase.
CVE-2025-40153
published 2025-11-12

CVE-2025-40153: In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: avoid soft lockup when mprotect to large memory area When calling mprotect()…

PriorityP421high7.8
EPSS
0.20%
9.7th percentile
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 hugetl

Affected

31 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
debianlinux-6.1< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
linuxlinux
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 30498c44c2a0b20f6833ed7d8fc3df901507f76030498c44c2a0b20f6833ed7d8fc3df901507f760
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 5783485ab2be06be5312b26c8793526edc09123d5783485ab2be06be5312b26c8793526edc09123d
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 547e123e9d342a44c756446640ed847a8aeec611547e123e9d342a44c756446640ed847a8aeec611
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 957faf9582f92bb2be8ebe4ab6aa1c2bc71d9859957faf9582f92bb2be8ebe4ab6aa1c2bc71d9859
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 964598e6f70a1be9fe675280bf16b4f96b0a6809964598e6f70a1be9fe675280bf16b4f96b0a6809
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < 4975c975ed9457a77953a26aeef85fdba7cf54984975c975ed9457a77953a26aeef85fdba7cf5498
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < c6096f3947f68f96defedb8764b3b1ca4cf3469fc6096f3947f68f96defedb8764b3b1ca4cf3469f
linuxlinux>= 8f860591ffb29738cf5539b6fbf27f50dcdeb380 < f52ce0ea90c83a28904c7cc203a70e6434adfecbf52ce0ea90c83a28904c7cc203a70e6434adfecb
linuxlinux_kernel>= 0 < 5.10.247-15.10.247-1
linuxlinux_kernel>= 0 < 6.1.158-16.1.158-1
linuxlinux_kernel>= 0 < 6.12.57-16.12.57-1
linuxlinux_kernel>= 0 < 6.17.6-16.17.6-1
linuxlinux_kernel>= 0 < 5.15.0-170.1805.15.0-170.180
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 2.6.17 < 5.4.3015.4.301
linuxlinux_kernel>= 5.11.0 < 5.15.1955.15.195
linuxlinux_kernel>= 5.16.0 < 6.1.1566.1.156
linuxlinux_kernel>= 5.5.0 < 5.10.2465.10.246
linuxlinux_kernel>= 6.13.0 < 6.17.36.17.3
linuxlinux_kernel>= 6.2.0 < 6.6.1126.6.112
linuxlinux_kernel>= 6.7.0 < 6.12.536.12.53

CVSS provenance

osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_redhat5.5MEDIUM
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