Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.14.20 |
| Fedoraproject | Fedora | 34 |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1997958Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c7509ExploitPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220407-0006/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3739Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/08/25/3Mailing ListPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1997958Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c7509ExploitPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220407-0006/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3739Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/08/25/3Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2021-3739?
CVE-2021-3739 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 attacke...
How severe is CVE-2021-3739?
CVE-2021-3739 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3739?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Netapp H300S Firmware, Netapp H300S, Netapp H500S Firmware.