CVE-2022-48869— 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 USB 组件在gadgetfs文件系统中存在竞态条件问题。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | e5d82a7360d124ae1a38c2a5eac92ba49b125191< 9a39f4626b361ee7aa10fd990401c37ec3b466ae |
affected |
e5d82a7360d124ae1a38c2a5eac92ba49b125191< 856e4b5e53f21edbd15d275dde62228dd94fb2b4 |
affected | ||
e5d82a7360d124ae1a38c2a5eac92ba49b125191< a2e075f40122d8daf587db126c562a67abd69cf9 |
affected | ||
e5d82a7360d124ae1a38c2a5eac92ba49b125191< 616fd34d017000ecf9097368b13d8a266f4920b3 |
affected | ||
e5d82a7360d124ae1a38c2a5eac92ba49b125191< d18dcfe9860e842f394e37ba01ca9440ab2178f4 |
affected | ||
5.3 |
affected | ||
< 5.3 |
unaffected | ||
5.4.230≤ 5.4.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2022-48869 基础信息
漏洞信息
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Vulnerability Title
USB: gadgetfs: Fix race between mounting and unmounting
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
USB: gadgetfs: Fix race between mounting and unmounting
The syzbot fuzzer and Gerald Lee have identified a use-after-free bug
in the gadgetfs driver, involving processes concurrently mounting and
unmounting the gadgetfs filesystem. In particular, gadgetfs_fill_super()
can race with gadgetfs_kill_sb(), causing the latter to deallocate
the_device while the former is using it. The output from KASAN says,
in part:
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline]
BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline]
BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline]
BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline]
BUG: KASAN: use-after-free in put_dev drivers/usb/gadget/legacy/inode.c:159 [inline]
BUG: KASAN: use-after-free in gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086
Write of size 4 at addr ffff8880276d7840 by task syz-executor126/18689
CPU: 0 PID: 18689 Comm: syz-executor126 Not tainted 6.1.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
<TASK>
...
atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline]
__refcount_sub_and_test include/linux/refcount.h:272 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
put_dev drivers/usb/gadget/legacy/inode.c:159 [inline]
gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086
deactivate_locked_super+0xa7/0xf0 fs/super.c:332
vfs_get_super fs/super.c:1190 [inline]
get_tree_single+0xd0/0x160 fs/super.c:1207
vfs_get_tree+0x88/0x270 fs/super.c:1531
vfs_fsconfig_locked fs/fsopen.c:232 [inline]
The simplest solution is to ensure that gadgetfs_fill_super() and
gadgetfs_kill_sb() are serialized by making them both acquire a new
mutex.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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 USB 组件在gadgetfs文件系统中存在竞态条件问题。
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-2022-48869 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2022-48869 其他参考 (5)
同批安全公告 · Linux · 2024-08-21 · 共 68 条
| CVE-2023-52910 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43881 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48871 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43878 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48883 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43877 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48892 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43882 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43880 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52913 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48899 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48872 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48873 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48874 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52903 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48878 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48887 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52907 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43872 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52909 | 7.5 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 68 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48869
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