Vulnerability CVE-2021-47351
Published: 2024-05-21

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

 References:
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
Copyright 2026, cxsecurity.com

 

Back to Top