CVE-2021-47351

ubifs: Fix races between xattr_{set|get} and listxattr operations

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 May 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

Linux · Linux

References

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