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CVE-2025-40153— mm: hugetlb: avoid soft lockup when mprotect to large memory area

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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mprotect处理大容量hugetlb内存时存在软锁定问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8f860591ffb29738cf5539b6fbf27f50dcdeb380< 30498c44c2a0b20f6833ed7d8fc3df901507f760 affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< 5783485ab2be06be5312b26c8793526edc09123d affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< 547e123e9d342a44c756446640ed847a8aeec611 affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< 957faf9582f92bb2be8ebe4ab6aa1c2bc71d9859 affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< 964598e6f70a1be9fe675280bf16b4f96b0a6809 affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< 4975c975ed9457a77953a26aeef85fdba7cf5498 affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< c6096f3947f68f96defedb8764b3b1ca4cf3469f affected
8f860591ffb29738cf5539b6fbf27f50dcdeb380< f52ce0ea90c83a28904c7cc203a70e6434adfecb affected
… +10 more rows
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I. Basic Information for CVE-2025-40153

Vulnerability Information
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Vulnerability Title
mm: hugetlb: avoid soft lockup when mprotect to large memory area
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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mprotect处理大容量hugetlb内存时存在软锁定问题。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 8f860591ffb29738cf5539b6fbf27f50dcdeb380 ~ 30498c44c2a0b20f6833ed7d8fc3df901507f760 -
Linux Linux 2.6.17 -

II. Public POCs for CVE-2025-40153

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III. Intelligence Information for CVE-2025-40153

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Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total

CVE-2025-40176 9.8 CRITICAL tls: wait for pending async decryptions if tls_strp_msg_hold fails
CVE-2025-40140 8.8 HIGH net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
CVE-2025-40168 8.1 HIGH smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().
CVE-2025-40158 8.1 HIGH ipv6: use RCU in ip6_output()
CVE-2025-40186 8.1 HIGH tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().
CVE-2025-40135 8.1 HIGH ipv6: use RCU in ip6_xmit()
CVE-2025-40133 8.1 HIGH mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().
CVE-2025-40204 8.1 HIGH sctp: Fix MAC comparison to be constant-time
CVE-2025-40141 8.0 HIGH Bluetooth: ISO: Fix possible UAF on iso_conn_free
CVE-2025-40172 7.8 HIGH accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
CVE-2025-40174 7.8 HIGH x86/mm: Fix SMP ordering in switch_mm_irqs_off()
CVE-2025-40167 7.8 HIGH ext4: detect invalid INLINE_DATA + EXTENTS flag combination
CVE-2025-40173 7.8 HIGH net/ip6_tunnel: Prevent perpetual tunnel growth
CVE-2025-40159 7.8 HIGH xsk: Harden userspace-supplied xdp_desc validation
CVE-2025-40182 7.8 HIGH crypto: skcipher - Fix reqsize handling
CVE-2025-40151 7.8 HIGH LoongArch: BPF: No support of struct argument in trampoline programs
CVE-2025-40206 7.8 HIGH netfilter: nft_objref: validate objref and objrefmap expressions
CVE-2025-40118 7.8 HIGH scsi: pm80xx: Fix array-index-out-of-of-bounds on rmmod
CVE-2025-40190 7.8 HIGH ext4: guard against EA inode refcount underflow in xattr update
CVE-2025-40166 7.8 HIGH drm/xe/guc: Check GuC running state before deregistering exec queue

Showing top 20 of 96 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40153

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