CVE-2023-53692— 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ext4_find_extent函数存在释放后重用问题，可能导致内存损坏。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 25
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1ed1eef0551bebee8e56973ccd0900e3578edfb7< 0ce15000dee0ecd6f235f925a327803e2ef489c6 |
affected |
6f4200ec76a0d31200c308ec5a71c68df5417004< a34f6dcb78c654ab905642c1b4e7e5fbb4f0babe |
affected | ||
9404839e0c9db5a517ea83c0ca3388b39d105fdf< 770b0613637f59f3091dda1ff0c23671a5326b9c |
affected | ||
d440d6427a5e3a877c1c259b8d2b216ddb65e185< 40566def189c513be2c694681256d7486cc6e368 |
affected | ||
81b915181c630ee1cffa052e52874fe4e1ba91ac< 96d440bee177669dc0acedca0abd73bae6a9be8b |
affected | ||
131294c35ed6f777bd4e79d42af13b5c41bf2775< 11c87c8df2cae1d6be83c07e59fef0792de73482 |
affected | ||
131294c35ed6f777bd4e79d42af13b5c41bf2775< 14da044725a3ab10affa3566d29c15737c0e67a4 |
affected | ||
131294c35ed6f777bd4e79d42af13b5c41bf2775< 835659598c67907b98cd2aa57bb951dfaf675c69 |
affected | ||
| … +17 条更多 | |||
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一、 漏洞 CVE-2023-53692 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
ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
Syzbot found the following issue:
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none.
==================================================================
BUG: KASAN: use-after-free in ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline]
BUG: KASAN: use-after-free in ext4_find_extent+0x76e/0xd90 fs/ext4/extents.c:931
Read of size 4 at addr ffff888073644750 by task syz-executor420/5067
CPU: 0 PID: 5067 Comm: syz-executor420 Not tainted 6.2.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
print_address_description+0x74/0x340 mm/kasan/report.c:306
print_report+0x107/0x1f0 mm/kasan/report.c:417
kasan_report+0xcd/0x100 mm/kasan/report.c:517
ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline]
ext4_find_extent+0x76e/0xd90 fs/ext4/extents.c:931
ext4_clu_mapped+0x117/0x970 fs/ext4/extents.c:5809
ext4_insert_delayed_block fs/ext4/inode.c:1696 [inline]
ext4_da_map_blocks fs/ext4/inode.c:1806 [inline]
ext4_da_get_block_prep+0x9e8/0x13c0 fs/ext4/inode.c:1870
ext4_block_write_begin+0x6a8/0x2290 fs/ext4/inode.c:1098
ext4_da_write_begin+0x539/0x760 fs/ext4/inode.c:3082
generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
ext4_file_write_iter+0x1d0/0x18f0
call_write_iter include/linux/fs.h:2186 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7dc/0xc50 fs/read_write.c:584
ksys_write+0x177/0x2a0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4b7a9737b9
RSP: 002b:00007ffc5cac3668 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4b7a9737b9
RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f4b7a933050 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000079f R11: 0000000000000246 R12: 00007f4b7a9330e0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Above issue is happens when enable bigalloc and inline data feature. As
commit 131294c35ed6 fixed delayed allocation bug in ext4_clu_mapped for
bigalloc + inline. But it only resolved issue when has inline data, if
inline data has been converted to extent(ext4_da_convert_inline_data_to_extent)
before writepages, there is no EXT4_STATE_MAY_INLINE_DATA flag. However
i_data is still store inline data in this scene. Then will trigger UAF
when find extent.
To resolve above issue, there is need to add judge "ext4_has_inline_data(inode)"
in ext4_clu_mapped().
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ext4_find_extent函数存在释放后重用问题，可能导致内存损坏。
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-2023-53692 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2023-53692 补丁与修复 (7)
同批安全公告 · Linux · 2025-10-22 · 共 67 条
| CVE-2023-53705 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53711 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53713 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53729 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53698 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53707 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53695 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53718 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50581 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50567 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50570 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50569 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53726 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53704 | Linux kernel 安全漏洞 | |
| CVE-2023-53710 | Linux kernel 安全漏洞 | |
| CVE-2023-53706 | Linux kernel 安全漏洞 | |
| CVE-2023-53709 | Linux kernel 安全漏洞 | |
| CVE-2023-53708 | Linux kernel 安全漏洞 | |
| CVE-2023-53712 | Linux kernel 安全漏洞 | |
| CVE-2023-53714 | Linux kernel 安全漏洞 |
显示前 20 条，共 67 条。 查看全部 → →
IV. Related Vulnerabilities
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