High severity · published Feb 16, 2022
CVE-2021-3752
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
7.1
CVSS
1.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.12 before 4.4.293; 4.5 before 4.9.291; 4.10 before 4.14.256; 4.15 before 4.19.218; 4.20 before 5.4.160; 5.5 before 5.10.80; +2 more · source: NVD
3S
3scale · Redhat
2.0 · source: NVD
CC
Communications Cloud Native Core Binding Support Function · Oracle
22.1.3 · source: NVD
CC
Communications Cloud Native Core Network Exposure Function · Oracle
22.1.1 · source: NVD
CC
Communications Cloud Native Core Policy · Oracle
22.2.0 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Real Time · Redhat
7 · source: NVD
EL
Enterprise Linux For Real Time For Nfv · Redhat
7 · source: NVD
FE
Fedora · Fedoraproject
34 · source: NVD
HF
H300e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H300s Firmware · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3752
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3752
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1999544
Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
lore.kernel.org
https://lore.kernel.org/lkml/20211115165435.133245729%40linuxfoundation.org/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0009/
Third Party Advisory
https://www.debian.org/security/2022/dsa-5096
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