kernel: possible use-after-free in bluetooth module
Published Feb 16, 2022
7.1
HIGHCVSS 3.1
EPSS 1.74%
Description
A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Affected products
- Vendor n/a Product Kernel Defaultn/a
- Version kernel 5.15.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel | n/a |
|
Configuration 1
- ≥ 2.6.12 · < 4.4.293
- ≥ 4.5 · < 4.9.291
- ≥ 4.10 · < 4.14.256
- ≥ 4.15 · < 4.19.218
- ≥ 4.20 · < 5.4.160
- ≥ 5.5 · < 5.10.80
- ≥ 5.11 · < 5.14.19
- ≥ 5.15 · < 5.15.3
Configuration 2
- 2.0
- 4.0
- 34
- 7.0
- 8.0
- 7
- 7
Configuration 3
- n/a
Configuration 4
- n/a
Configuration 5
- n/a
Configuration 6
- n/a
Configuration 7
- n/a
Configuration 8
- n/a
Configuration 9
- n/a
Configuration 10
- n/a
Configuration 11
- 9.0
- 10.0
Configuration 12
- 22.1.3
- 22.1.1
- 22.2.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1160.59.1.el7
Fixed · RHSA-2022:0620
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7
Fixed · RHSA-2022:0622
Red Hat Enterprise Linux 8
kernel-0:4.18.0-372.9.1.el8
Fixed · RHSA-2022:1988
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-372.9.1.rt7.166.el8
Fixed · RHSA-2022:1975
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1160.59.1.el7 | Fixed | RHSA-2022:0620 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7 | Fixed | RHSA-2022:0622 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-372.9.1.el8 | Fixed | RHSA-2022:1988 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-372.9.1.rt7.166.el8 | Fixed | RHSA-2022:1975 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue is rated as having Moderate impact because Only local users with privileges to access the sock_dgram Bluetooth socket can trigger this issue.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation baser or stability. The possible solution is to disable Bluetooth completely: https://access.redhat.com/solutions/2682931
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:A/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022-2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.74% (0.01736) | 76.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.75% (0.01751) | 74.86th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00022) | 3.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.12% (0.00120) | 47.93th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.12% (0.00120) | 46.03th | v3 (v2023.03.01) |
| Oct 8, 2023 | 0.19% (0.00188) | 56.01th | v3 (v2023.03.01) |
| Sep 24, 2023 | 0.15% (0.00148) | 50.34th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.12% (0.00123) | 45.75th | v3 (v2023.03.01) |
| May 24, 2023 | 0.11% (0.00108) | 42.45th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00097) | 39.08th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.10% (0.01104) | 54.02th | v2 (v2022.01.01) |
| Jul 26, 2022 | 1.10% (0.01104) | 51.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Mar 10, 2022 | 1.03% (0.01034) | 21.22th | v2 (v2022.01.01) |
| Feb 17, 2022 | 0.89% (0.00890) | 12.61th | v2 (v2022.01.01) |
References (12)
- https://access.redhat.com/security/cve/CVE-2021-3752 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1999544 x_refsource_MISCIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lore.kernel.org/lkml/20211115165435.133245729%40linuxfoundation.org/ x_refsource_MISC
- https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/
- https://nvd.nist.gov/vuln/detail/CVE-2021-3752
- https://security.netapp.com/advisory/ntap-20220318-0009/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2021-3752
- https://www.debian.org/security/2022/dsa-5096 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.openwall.com/lists/oss-security/2021/09/15/4 x_refsource_MISCExploitMailing ListThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.