CVE-2023-53747— 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vcs_write中未重新加载vc_data指针，可能导致释放后重用。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 934de9a9b659785fed3e820bc0c813a460c71fea |
affected |
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 0deff678157333d775af190f84696336cdcccd6d |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< a4e3c4c65ae8510e01352c9a4347e05c035b2ce2 |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 11dddfbb7a4e62489b01074d6c04d9d1b42e4047 |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67 |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 3338d0b9acde770ee588eead5cac32c25e7048fc |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 1de42e7653d6714a7507ba6696151a1fa028c69f |
affected | ||
ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff< 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2023-53747 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF
After a call to console_unlock() in vcs_write() the vc_data struct can be
freed by vc_port_destruct(). Because of that, the struct vc_data pointer
must be reloaded in the while loop in vcs_write() after console_lock() to
avoid a UAF when vcs_size() is called.
Syzkaller reported a UAF in vcs_size().
BUG: KASAN: slab-use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)
Read of size 4 at addr ffff8880beab89a8 by task repro_vcs_size/4119
Call Trace:
<TASK>
__asan_report_load4_noabort (mm/kasan/report_generic.c:380)
vcs_size (drivers/tty/vt/vc_screen.c:215)
vcs_write (drivers/tty/vt/vc_screen.c:664)
vfs_write (fs/read_write.c:582 fs/read_write.c:564)
...
<TASK>
Allocated by task 1213:
kmalloc_trace (mm/slab_common.c:1064)
vc_allocate (./include/linux/slab.h:559 ./include/linux/slab.h:680
drivers/tty/vt/vt.c:1078 drivers/tty/vt/vt.c:1058)
con_install (drivers/tty/vt/vt.c:3334)
tty_init_dev (drivers/tty/tty_io.c:1303 drivers/tty/tty_io.c:1415
drivers/tty/tty_io.c:1392)
tty_open (drivers/tty/tty_io.c:2082 drivers/tty/tty_io.c:2128)
chrdev_open (fs/char_dev.c:415)
do_dentry_open (fs/open.c:921)
vfs_open (fs/open.c:1052)
...
Freed by task 4116:
kfree (mm/slab_common.c:1016)
vc_port_destruct (drivers/tty/vt/vt.c:1044)
tty_port_destructor (drivers/tty/tty_port.c:296)
tty_port_put (drivers/tty/tty_port.c:312)
vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))
vt_ioctl (drivers/tty/vt/vt_ioctl.c:903)
tty_ioctl (drivers/tty/tty_io.c:2778)
...
The buggy address belongs to the object at ffff8880beab8800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 424 bytes inside of
freed 1024-byte region [ffff8880beab8800, ffff8880beab8c00)
The buggy address belongs to the physical page:
page:00000000afc77580 refcount:1 mapcount:0 mapping:0000000000000000
index:0x0 pfn:0xbeab8
head:00000000afc77580 order:3 entire_mapcount:0 nr_pages_mapped:0
pincount:0
flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff)
page_type: 0xffffffff()
raw: 000fffffc0010200 ffff888100042dc0 ffffea000426de00 dead000000000002
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880beab8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880beab8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880beab8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880beab8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880beab8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Disabling lock debugging due to kernel taint
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vcs_write中未重新加载vc_data指针，可能导致释放后重用。
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-2023-53747 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-12-08 · 共 82 条
| CVE-2023-53751 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40320 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53769 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40318 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53764 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53762 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40292 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40309 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40317 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40302 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53768 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40297 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50630 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50623 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53759 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53763 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40319 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40323 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53753 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53752 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 82 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2023-53747
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