CVE-2026-64364— 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基金会开源的一款操作系统内核。 Linux kernel 6.18版本存在安全漏洞，该漏洞源于多点触控驱动在访问mt_io_flags时未正确限制槽位索引边界，导致越界位访问，可能造成空指针解引用和内核崩溃。
影响版本矩阵 25
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fc488f675344931ffab6a51c43691065ec006567< 12e90656e330ff8bbaf2f29c535fdb8a11cc6f55 |
affected |
77711d850bed75ae7142c3d1f22c1a8b4d049c33< 152983d87387f6a8ae72b73474cfa55fbcf1ec75 |
affected | ||
6acfe25968913788d30ec0eedd80178c4ea3f1d0< b5c037d6b807017e74a115288f81bc9cd5a5aab8 |
affected | ||
d280c138e66be87d1fccfed42593f02fdb893905< a6d5ce2e1a2d7bf189bde8a659d04b65f0b0725d |
affected | ||
f32fea4c0234c971c12e46d76612cdc2dd4bb046< e24918ee67c4dc3d20d4670750e46e9b160365f4 |
affected | ||
46f781e0d151844589dc2125c8cce3300546f92a< 37daa8c96bd563d03150e23f094cb60703594a6d |
affected | ||
46f781e0d151844589dc2125c8cce3300546f92a< 6493ebf9489efef0105078377b973ab33d51af22 |
affected | ||
46f781e0d151844589dc2125c8cce3300546f92a< 8813b0612275cc61fe9e6603d0ee019247ade6be |
affected | ||
| … +17 条更多 | |||
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一、 漏洞 CVE-2026-64364 基础信息
漏洞信息
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Vulnerability Title
HID: multitouch: fix out-of-bounds bit access on mt_io_flags
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
HID: multitouch: fix out-of-bounds bit access on mt_io_flags
mt_io_flags is a single unsigned long, but mt_process_slot(),
mt_release_pending_palms() and mt_release_contacts() use it as a
per-slot bitmap indexed by the slot number. That slot number is only
bounded by td->maxcontacts, which is taken from the device's
ContactCountMaximum feature report and can be up to 255, not by
BITS_PER_LONG.
As a result, a multitouch device that advertises a large contact count
makes set_bit()/clear_bit() operate past the mt_io_flags word and
corrupt the adjacent members of struct mt_device. The sticky-fingers
release timer is the easiest way to reach this. mt_release_contacts()
runs
for (i = 0; i < mt->num_slots; i++)
clear_bit(i, &td->mt_io_flags);
with num_slots == maxcontacts. For maxcontacts around 250 the loop
clears the bits that overlap td->applications.next, zeroing that list
head, and the list_for_each_entry() that immediately follows then
dereferences NULL. The kernel panics from timer (softirq) context. On a
KASAN build this shows up as a general protection fault in
mt_release_contacts() with a null-ptr-deref at offset 0x58, which is
offsetof(struct mt_application, num_received).
The state is reachable from an untrusted USB or Bluetooth HID
multitouch device; no local privileges are required.
Store the per-slot active state in a separately allocated bitmap sized
for maxcontacts, the same pattern already used for pending_palm_slots,
and keep only MT_IO_FLAGS_RUNNING in mt_io_flags. The two
"mt_io_flags & MT_IO_SLOTS_MASK" arming checks become
bitmap_empty(td->active_slots, td->maxcontacts).
Move MT_IO_FLAGS_RUNNING back to bit 0. It was bumped to bit 32 by the
same commit to leave the low byte for the slot bits; with the slot bits
gone it fits in bit 0 again, which also keeps it within the unsigned
long on 32-bit.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/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基金会开源的一款操作系统内核。 Linux kernel 6.18版本存在安全漏洞，该漏洞源于多点触控驱动在访问mt_io_flags时未正确限制槽位索引边界，导致越界位访问，可能造成空指针解引用和内核崩溃。
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-2026-64364 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64364 补丁与修复 (8)
同批安全公告 · Linux · 2026-07-25 · 共 274 条
| CVE-2026-64355 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64410 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64399 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64397 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64391 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64387 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64386 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64385 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64383 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64268 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64384 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64439 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64523 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64459 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64303 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64257 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64269 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64393 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64320 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64319 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 274 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-64364
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