CVE-2021-47433

btrfs: fix abort logic in btrfs_replace_file_extents

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix abort logic in btrfs_replace_file_extents Error injection testing uncovered a case where we'd end up with a corrupt file system with a missing extent in the middle of a file. This occurs because the if statement to decide if we should abort is wrong. The only way we would abort in this case is if we got a ret != -EOPNOTSUPP and we called from the file clone code. However the prealloc code uses this path too. Instead we need to abort if there is an error, and the only error we _don't_ abort on is -EOPNOTSUPP and only if we came from the clone file code.

N/A

CVSS

Severity:

EPSS 0.08%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378
https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26c
https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108f

Frequently Asked Questions

What is the severity of CVE-2021-47433?: CVE-2021-47433 has not yet been assigned a CVSS score.
How to fix CVE-2021-47433?: To fix CVE-2021-47433, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47433 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47433 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47433?: CVE-2021-47433 affects Linux Linux, Linux Linux.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.