Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.15 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2026485Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.htmlMailing ListThird Party Advisory
- https://lkml.org/lkml/2021/10/18/885ExploitMailing ListPatch
- https://lkml.org/lkml/2021/9/13/2565ExploitMailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2026485Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.htmlMailing ListThird Party Advisory
- https://lkml.org/lkml/2021/10/18/885ExploitMailing ListPatch
- https://lkml.org/lkml/2021/9/13/2565ExploitMailing ListThird Party Advisory
FAQ
What is CVE-2021-4149?
CVE-2021-4149 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2021-4149?
CVE-2021-4149 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4149?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.