CVE-2021-47433
btrfs: fix abort logic in btrfs_replace_file_extents
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.58% · top 52% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected 8fccebfa534c7984864394fa03608305e4929aae – < 0e32a2b85c7d92ece86c17dfef390c5ed79c6378
- affected 8fccebfa534c7984864394fa03608305e4929aae – < 0e309e1152fc34ef75991d9d69b165dbf75bf26c
- affected 8fccebfa534c7984864394fa03608305e4929aae – < 4afb912f439c4bc4e6a4f3e7547f2e69e354108f
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.75 – ≤ 5.10.*
- unaffected 5.14.14 – ≤ 5.14.*
- unaffected 5.15 – ≤ *
References (3)
- https://git.kernel.org/stable/c/0e32a2b85c7d92ece86c17dfef390c5ed79c6378 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0e309e1152fc34ef75991d9d69b165dbf75bf26c (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/4afb912f439c4bc4e6a4f3e7547f2e69e354108f (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2021-47433)Record last updated .