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CVE-2021-4149
A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs.…
Medium5.5EPSS 0.40%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs. In this flaw, a user with a local privilege may cause a denial of service (DOS) due to a deadlock problem.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| 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)
- 0.40% · top 66% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
kernel
- affected kernel 5.15 rc6
References (4)
- https://bugzilla.redhat.com/show_bug.cgi?id=2026485 (opens in a new tab)x_refsource_MISCx_transferred
- https://lkml.org/lkml/2021/10/18/885 (opens in a new tab)x_refsource_MISCx_transferred
- https://lkml.org/lkml/2021/9/13/2565 (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20220701 [SECURITY] [DLA 3065-1] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_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)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-4149)Record last updated .