CVE-2021-0399
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free....
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-176919394References: Upstream kernel
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-176919394References: Upstream kernel
- Record
CVE-2021-0399- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-176919394References: Upstream kernel
- Record
CVE-2021-0399- Updated
- 2026-11-02
EUVDEUVD-2021-3018 No score
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-176919394References: Upstream kernel
- Record
EUVD-2021-3018- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hc9r-vrrg-qrww No score
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free....
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-176919394References: Upstream kernel
- Record
GHSA-hc9r-vrrg-qrww- Weakness
- CWE-416
- Updated
- 2026-11-02
OSVASB-A-176919394 No score
In qtaguid_untag of xt_qtaguid.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
- Record
ASB-A-176919394- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
:linux_kernel:Android |
:0 up to :2021-03-05, plus listed versions Kernel |
:2021-03-05 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | nipund513/Exploiting-UAF-by-Ret2bpf-in-Android-Kernel-CVE-2021-0399- | 2023-03-15 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-0399 is a high vulnerability (CVSS 7.8) in Google Android, published March 1, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in :linux_kernel: :2021-03-05.
References
source.android.com/security/bulletin/2021-03-01
nvd.nist.gov/vuln/detail/CVE-2021-0399
github.com/advisories/GHSA-hc9r-vrrg-qrww
android.googlesource.com/kernel/common/+/c2ab93b45b5cdc426868fb8793ada2cac20568ef
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