CVE-2026-74518— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.10版本存在安全漏洞，该漏洞源于allocate_file_region_entries()函数中list_splice()未重新初始化源链表头，在并发操作共享resv_map时可能导致链表损坏，进而导致内核崩溃或释放后重用。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d3ec7b6e09e512ba902b86bcca2c512fb06d492f< 01b8569233e47693d6ff7efa96d9854c55f936fc |
affected |
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< 9c5fdffc5e1ce84403c58289ee72697051803bf7 |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3 |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< 62e1c2741a4d923d9854efd5927a6212aad7a187 |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< 587a0accc2b4fccc5cf7baf0fe34e50efde51f9c |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< 126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< ac1bb7fd45088d0db57a22ce7729f258ebd63cf5 |
affected | ||
d3ec7b6e09e512ba902b86bcca2c512fb06d492f< dd9623f58ec702a07b2d67179d6fcea79c52231a |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-74518 基础信息
漏洞信息
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Vulnerability Title
mm/hugetlb: fix list corruption in allocate_file_region_entries()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm/hugetlb: fix list corruption in allocate_file_region_entries()
allocate_file_region_entries() tops up resv->region_cache with freshly
allocated file_region descriptors. The allocation uses GFP_KERNEL, so
resv->lock is dropped around it: the new entries are gathered on a
stack-local list head, allocated_regions, and spliced into
resv->region_cache once the lock is re-acquired.
The splice used list_splice(), which moves the entries but does not
re-initialize the source head, so allocated_regions is left pointing at an
entry that now lives on resv->region_cache. The top-up runs in a while
loop that re-checks the cache deficit after re-acquiring the lock. For a
shared mapping the resv_map is shared by every mapper of the hugetlbfs
inode, so a concurrent region_chg()/region_add()/region_del() on the same
resv_map can consume cache entries during the unlocked window and force a
second iteration. That iteration calls list_add() on the stale head and
corrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check
trips:
list_add corruption. next->prev should be prev (ffffc900011ff7f8),
but was ffff88814c281460. (next=ffff88814c545640).
kernel BUG at lib/list_debug.c:31!
allocate_file_region_entries+0x191/0x420
region_chg+0x267/0x300
hugetlb_reserve_pages+0x387/0xc80
hugetlbfs_file_mmap+0x2ce/0x3f0
mmap_region+0x1348/0x1a80
do_mmap+0x85e/0xb90
vm_mmap_pgoff+0x18c/0x330
ksys_mmap_pgoff+0x2a1/0x3e0
do_syscall_64+0xd7/0x420
Without CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack
address into resv->region_cache, leading to later use-after-free.
This was observed as a real host panic on a dense KVM host where a QEMU
guest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate
SPDK/DPDK vhost-user target, generating concurrent region_* traffic on one
shared resv_map.
Use list_splice_init() so the source head is re-initialized empty after
each splice, making the retry loop safe.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.10版本存在安全漏洞，该漏洞源于allocate_file_region_entries()函数中list_splice()未重新初始化源链表头，在并发操作共享resv_map时可能导致链表损坏，进而导致内核崩溃或释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-74518 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74518 补丁与修复 (8)
同批安全公告 · Linux · 2026-08-15 · 共 844 条
| CVE-2026-74280 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74279 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72046 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74376 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72217 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72299 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74384 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72210 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72211 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72209 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72317 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74267 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72206 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72207 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 844 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-74518
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