CVE-2021-4149
MEDIUM
5.5
CVSS Score
Published: March 23, 2022 at 07:46 PM UTC
Updated: June 17, 2026 at 04:19 AM UTC
3 products affected across 3 vendorsLinux KernelDebian LinuxKernel
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%Affected range stops below 5.15, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2026485Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/07/msg00000.htmlx_refsource_MISCExploitMailing ListPatchThird Party Advisory
Source: [email protected]
https://lkml.org/lkml/2021/10/18/885x_refsource_MISCExploitMailing ListThird Party Advisory
Source: [email protected]
https://lkml.org/lkml/2021/9/13/2565CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-667
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