CVE-2021-47433
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.
Does this matter?
Lower severity and a low EPSS score (0.57%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.57% probability · 46th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26cPatch
- https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378Patch
- https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108fPatch
- https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26cPatch
- https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378Patch
- https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108fPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.