CVE-2021-47351

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d < 7adc05b73d91a5e3d4ca7714fa53ad9b70c53d08affected
LinuxLinux1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d < 38dde03eb239605f428f3f1e4baa73d4933a4cc6affected
LinuxLinux1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d < 9558612cb829f2c022b788f55d6b8437d5234a82affected
LinuxLinux1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d < c0756f75c22149d20fcb7d8409827cee905eb386affected
LinuxLinux1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d < f4e3634a3b642225a530c292fdb1e8a4007507f5affected
LinuxLinux2.6.27affected
LinuxLinux0 < 2.6.27unaffected
LinuxLinux5.4.133 <= 5.4.*unaffected
LinuxLinux5.10.51 <= 5.10.*unaffected
LinuxLinux5.12.18 <= 5.12.*unaffected
LinuxLinux5.13.3 <= 5.13.*unaffected
LinuxLinux5.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References