CVE-2021-3739 — NULL Pointer Dereference in Linux
Severity
7.1HIGHNVD
OSV7.8OSV6.5
EPSS
0.0%
top 92.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 10
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HExploitability: 1.8 | Impact: 5.2
Affected Packages6 packages
Also affects: Fedora 34
Patches
🔴Vulnerability Details
6OSV▶
CVE-2021-3739: A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes↗2022-03-10
OSV▶
linux-bluefield, linux-gke-5.4, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities↗2021-11-11
OSV▶
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm vulnerabilities↗2021-11-09
📋Vendor Advisories
8Microsoft▶
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↗2022-03-08