Home/CVE/A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, whe
CVE

CVE-2021-3739

A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, whe

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.

HIGH · CVSS 7.1 EPSS 0.00028
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

10
linux kernel<= 5.14.20
fedoraproject fedoraall versions
netapp h300s firmwareall versions
netapp h500s firmwareall versions
netapp h700s firmwareall versions
netapp h300e firmwareall versions
netapp h500e firmwareall versions
netapp h700e firmwareall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091github.com
▣

Scoring & Timeline

7.1
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Mar 2022 · 05:43 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
⚑

Vendor Advisories

16
msrcCVE-2021-3739
usnUSN-5137-2
usnUSN-5137-1
usnUSN-5117-1
usnUSN-5115-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091Mailing ListPatchVendor 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
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