CVE-2021-47351 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ubifs: Fix races between xattr_set|get and listxattr operations

UBIFS may occur some problems with concurrent xattr_set|get and listxattr operations such as assertion failure memory corruption stale xattr value[1].

Fix it by importing a new rw-lock in @ubifs_inode to serilize write operations on xattr concurrent read operations are still effective just like ext4.

[1] https://lore.kernel.org/linux-mtd/20200630130438.141649-1-houtao1@huawei.com

Reference

https://git.kernel.org/stable/c/7adc05b73d91a5e3d4ca7714fa53ad9b70c53d08 https://git.kernel.org/stable/c/38dde03eb239605f428f3f1e4baa73d4933a4cc6 https://git.kernel.org/stable/c/9558612cb829f2c022b788f55d6b8437d5234a82 https://git.kernel.org/stable/c/c0756f75c22149d20fcb7d8409827cee905eb386 https://git.kernel.org/stable/c/f4e3634a3b642225a530c292fdb1e8a4007507f5