CVE-2024-26727— 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，该漏洞源于读取错误。
可能的 ATT&CK 技术 1 AI
T1211 · Exploitation for Stealth影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< 3f5d47eb163bceb1b9e613c9003bae5fefc0046f |
affected |
2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< e31546b0f34af21738c4ceac47d662c00ee6382f |
affected | ||
2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< 66b317a2fc45b2ef66527ee3f8fa08fb5beab88d |
affected | ||
2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< 833775656d447c545133a744a0ed1e189ce61430 |
affected | ||
2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< 5a172344bfdabb46458e03708735d7b1a918c468 |
affected | ||
2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788< e03ee2fe873eb68c1f9ba5112fee70303ebf9dfb |
affected | ||
917d608fe375041eb7f29befa6a6d7fd3cf32dde |
affected | ||
5.8.3< 5.9 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2024-26727 基础信息
漏洞信息
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Vulnerability Title
btrfs: do not ASSERT() if the newly created subvolume already got read
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: do not ASSERT() if the newly created subvolume already got read
[BUG]
There is a syzbot crash, triggered by the ASSERT() during subvolume
creation:
assertion failed: !anon_dev, in fs/btrfs/disk-io.c:1319
------------[ cut here ]------------
kernel BUG at fs/btrfs/disk-io.c:1319!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
RIP: 0010:btrfs_get_root_ref.part.0+0x9aa/0xa60
<TASK>
btrfs_get_new_fs_root+0xd3/0xf0
create_subvol+0xd02/0x1650
btrfs_mksubvol+0xe95/0x12b0
__btrfs_ioctl_snap_create+0x2f9/0x4f0
btrfs_ioctl_snap_create+0x16b/0x200
btrfs_ioctl+0x35f0/0x5cf0
__x64_sys_ioctl+0x19d/0x210
do_syscall_64+0x3f/0xe0
entry_SYSCALL_64_after_hwframe+0x63/0x6b
---[ end trace 0000000000000000 ]---
[CAUSE]
During create_subvol(), after inserting root item for the newly created
subvolume, we would trigger btrfs_get_new_fs_root() to get the
btrfs_root of that subvolume.
The idea here is, we have preallocated an anonymous device number for
the subvolume, thus we can assign it to the new subvolume.
But there is really nothing preventing things like backref walk to read
the new subvolume.
If that happens before we call btrfs_get_new_fs_root(), the subvolume
would be read out, with a new anonymous device number assigned already.
In that case, we would trigger ASSERT(), as we really expect no one to
read out that subvolume (which is not yet accessible from the fs).
But things like backref walk is still possible to trigger the read on
the subvolume.
Thus our assumption on the ASSERT() is not correct in the first place.
[FIX]
Fix it by removing the ASSERT(), and just free the @anon_dev, reset it
to 0, and continue.
If the subvolume tree is read out by something else, it should have
already get a new anon_dev assigned thus we only need to free the
preallocated one.
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，该漏洞源于读取错误。
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-2024-26727 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-26727 邮件列表归档 (1)
CVE-2024-26727 其他参考 (6)
同批安全公告 · Linux · 2024-04-03 · 共 94 条
| CVE-2024-26760 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26779 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26689 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26692 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26736 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26718 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26728 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52637 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26704 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26699 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26712 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26706 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26697 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26737 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26748 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26773 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26772 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26766 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26739 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26759 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 94 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-26727
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