ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state 漏洞信息(CVE-2022-49348)

一、漏洞 CVE-2022-49348 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞标题

ext4: 从磁盘超级块字段s_state中过滤出EXT4_FC_REPLAY

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:H/I:N/A:N

来源：AIGC 神龙大模型

漏洞类别

释放后使用

来源：AIGC 神龙大模型

漏洞标题

ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state

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: ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state The EXT4_FC_REPLAY bit in sbi->s_mount_state is used to indicate that we are in the middle of replay the fast commit journal. This was actually a mistake, since the sbi->s_mount_info is initialized from es->s_state. Arguably s_mount_state is misleadingly named, but the name is historical --- s_mount_state and s_state dates back to ext2. What should have been used is the ext4_{set,clear,test}_mount_flag() inline functions, which sets EXT4_MF_* bits in sbi->s_mount_flags. The problem with using EXT4_FC_REPLAY is that a maliciously corrupted superblock could result in EXT4_FC_REPLAY getting set in s_mount_state. This bypasses some sanity checks, and this can trigger a BUG() in ext4_es_cache_extent(). As a easy-to-backport-fix, filter out the EXT4_FC_REPLAY bit for now. We should eventually transition away from EXT4_FC_REPLAY to something like EXT4_MF_REPLAY.

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-2022-49348 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2022-49348 的情报信息

标题： ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2022-49348