一、 漏洞 CVE-2022-49428 基础信息
漏洞标题
F2FS: 修复对内联节点的合理性检查漏洞
来源：AIGC 神龙大模型
漏洞描述信息
N/A
来源：AIGC 神龙大模型
CVSS信息
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
来源：AIGC 神龙大模型
漏洞类别
对因果或异常条件的不恰当检查
来源：AIGC 神龙大模型
漏洞标题
f2fs: fix to do sanity check on inline_dots inode
来源：美国国家漏洞数据库 NVD
漏洞描述信息
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on inline_dots inode As Wenqing reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215765 It will cause a kernel panic with steps: - mkdir mnt - mount tmp40.img mnt - ls mnt folio_mark_dirty+0x33/0x50 f2fs_add_regular_entry+0x541/0xad0 [f2fs] f2fs_add_dentry+0x6c/0xb0 [f2fs] f2fs_do_add_link+0x182/0x230 [f2fs] __recover_dot_dentries+0x2d6/0x470 [f2fs] f2fs_lookup+0x5af/0x6a0 [f2fs] __lookup_slow+0xac/0x200 lookup_slow+0x45/0x70 walk_component+0x16c/0x250 path_lookupat+0x8b/0x1f0 filename_lookup+0xef/0x250 user_path_at_empty+0x46/0x70 vfs_statx+0x98/0x190 __do_sys_newlstat+0x41/0x90 __x64_sys_newlstat+0x1a/0x30 do_syscall_64+0x37/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is for special file: e.g. character, block, fifo or socket file, f2fs doesn't assign address space operations pointer array for mapping->a_ops field, so, in a fuzzed image, if inline_dots flag was tagged in special file, during lookup(), when f2fs runs into __recover_dot_dentries(), it will cause NULL pointer access once f2fs_add_regular_entry() calls a_ops->set_dirty_page().
来源：美国国家漏洞数据库 NVD
CVSS信息
N/A
来源：美国国家漏洞数据库 NVD
漏洞类别
N/A
来源：美国国家漏洞数据库 NVD
二、漏洞 CVE-2022-49428 的公开POC
# POC 描述 源链接 神龙链接
三、漏洞 CVE-2022-49428 的情报信息

  • 标题： f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签：

    f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree

  • 标题： f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签：

    f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree

  • 标题： f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签：

    f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree

  • 标题： f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签：

    f2fs: fix to do sanity check on inline_dots inode - kernel/git/stable/linux.git - Linux kernel stable tree
  • https://nvd.nist.gov/vuln/detail/CVE-2022-49428