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CVE-2021-3739

Date: March 7, 2022

A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.

Severity Score

Related Resources (11)

https://bugzilla.redhat.com/show_bug.cgi?id=1997958
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091
https://nvd.nist.gov/vuln/detail/CVE-2021-3739
https://access.redhat.com/security/cve/CVE-2021-3739
https://security.netapp.com/advisory/ntap-20220407-0006/
https://ubuntu.com/security/CVE-2021-3739
https://security-tracker.debian.org/tracker/CVE-2021-3739
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3739
https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091
https://www.openwall.com/lists/oss-security/2021/08/25/3
https://www.mend.io/vulnerability-database/CVE-2021-3739

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

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): HIGH
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

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

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