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CVE-2021-38203

Date: August 8, 2021

btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info.

Severity Score

Related Resources (7)

https://security-tracker.debian.org/tracker/CVE-2021-38203
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-38203
https://nvd.nist.gov/vuln/detail/CVE-2021-38203
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947
https://security.netapp.com/advisory/ntap-20210902-0010/
https://www.mend.io/vulnerability-database/CVE-2021-38203

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

Improper Locking

CWE-667

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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