CVE-2021-3739
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I. Basic Information for CVE-2021-3739
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于Linux kernel 的 btrfs_rm_device() 强制取消引用 NULL 指针，以触发拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | kernel | Fixed in v5.15-rc1 and above. | - |
II. Public POCs for CVE-2021-3739
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://security.netapp.com/advisory/ntap-20220407-0006/x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1997958x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2021/08/25/3x_refsource_MISC
- https://ubuntu.com/security/CVE-2021-3739x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3739
Same Patch Batch · n/a · 2022-03-07 · 46 CVEs total
| CVE-2022-25217 | Phicomm 多款产品信任管理问题漏洞 | |
| CVE-2022-25213 | Phicomm 多款产品信任管理问题漏洞 | |
| CVE-2022-25219 | Phicomm 多款产品安全漏洞 | |
| CVE-2021-34340 | Ming 缓冲区错误漏洞 | |
| CVE-2021-34339 | Ming 缓冲区错误漏洞 | |
| CVE-2021-34338 | Ming 缓冲区错误漏洞 | |
| CVE-2022-26662 | Tryton 安全漏洞 | |
| CVE-2022-26661 | Tryton 代码问题漏洞 | |
| CVE-2021-34341 | Ming 缓冲区错误漏洞 | |
| CVE-2022-25218 | 多款PHICOMM产品加密问题漏洞 | |
| CVE-2022-25215 | Phicomm多款产品安全漏洞 | |
| CVE-2022-25214 | Phicomm多款产品安全漏洞 | |
| CVE-2022-25243 | HashiCorp Vault 信任管理问题漏洞 | |
| CVE-2022-25244 | HashiCorp Vault 安全漏洞 | |
| CVE-2020-36517 | Home Assistant 安全漏洞 | |
| CVE-2021-41657 | SmartBear CodeCollaborator 输入验证错误漏洞 | |
| CVE-2021-43970 | Quicklert 代码问题漏洞 | |
| CVE-2021-43969 | Quicklert SQL注入漏洞 | |
| CVE-2022-22834 | OverIT Geocall 安全漏洞 | |
| CVE-2022-22835 | OverIT Geocall 代码问题漏洞 |
Showing top 20 of 46 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: kernel
- CVE-2025-26604
Possibility to retrieve bot token by malicious module develo - CVE-2021-35000
OpenBSD Kernel Multicast Routing Uninitialized Memory Inform - CVE-2021-34999
OpenBSD Kernel Multicast Routing Uninitialized Memory Inform - CVE-2021-34981
Linux Kernel Bluetooth CMTP Module Double Free Privilege Esc - CVE-2024-24898
Information Leakage in kernel
Same vendor: n/a
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bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-476
- CVE-2026-8252
Open5GS SMF smf_nsmf_handle_create_data_in_hsmf null pointer - CVE-2026-7259
Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2021-3739
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