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CVE-2021-33034

🗓️ 14 May 2021 22:57:07Reported by mitreType 
cve
 cve🔗 web.nvd.nist.gov📰️ 10 Media mentions👁 636 Views

Linux kernel before 5.12.4, net/bluetooth/hci_event.c use-after-free vulnerabilit

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ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: IBM QRadar Network Security is affected by multiple vulnerabilities in kernel.
7 Jul 202211:14
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Data Risk Manager is affected by multiple vulnerabilities
11 Oct 202118:12
–ibm
attackerkb
ATTACKERKB		CVE-2021-33034
14 May 202123:15
–attackerkb
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2-2021-1685 (ALAS-2021-1685)
16 Jul 202100:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2022-002 (ALASKERNEL-5.10-2022-002)
2 May 202200:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2022-004 (ALASKERNEL-5.4-2022-004)
2 May 202200:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : kernel (ALSA-2021:2570)
9 Feb 202200:00
–nessus
nessus
Tenable Nessus		CentOS 8 : kernel (CESA-2021:2570)
3 Jul 202100:00
–nessus
nessus
Tenable Nessus		CentOS 7 : kernel (RHSA-2021:2725)
22 Jul 202100:00
–nessus
nessus
Tenable Nessus		CentOS 7 : kpatch-patch (RHSA-2021:2727)
9 Oct 202400:00
–nessus
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NVD
Node
OR
linuxlinux_kernelRange<4.4.269
linuxlinux_kernelRange4.5–4.9.269
linuxlinux_kernelRange4.10–4.14.233
linuxlinux_kernelRange4.15–4.19.191
linuxlinux_kernelRange4.20–5.4.119
linuxlinux_kernelRange5.5–5.10.37
linuxlinux_kernelRange5.11–5.11.21
linuxlinux_kernelRange5.12–5.12.4
Node
fedoraprojectfedoraMatch34
Node
debiandebian_linuxMatch9.0

Multiple vulnerabilities in Red Hat.kpatch-patch CVE-2021-33909 CVE-2021-33034 CVE-2021-32399 CVE-2021-3347 https://t.co/tJhDOp8iVs?amp=1 https://t.co/8nb25XEjhB?amp=1

Multiple vulnerabilities in Red Hat.kernel CVE-2021-33909 CVE-2021-33034 CVE-2021-33033 CVE-2020-11668 CVE-2019-20934 https://t.co/UgrB8w7WHn?amp=1 https://t.co/1oJkS9XHyz?amp=1

Multiple vulnerabilities in Red Hat.RHV-H CVE-2021-33909 CVE-2021-33034 https://t.co/khOVCa6fPB?amp=1

Red Hat.RHV-Hに複数の脆弱性 CVE-2021-33909 CVE-2021-33034 https://t.co/khOVCa6fPB?amp=1

www_sesin_at

New post from https://t.co/9KYxtdHHVL (CVE-2021-33034 (debian_linux, fedora, linux_kernel)) has been published on https://t.co/G8gLRvB4zA

threatintelctr

NEW: CVE-2021-33034 In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. Severity: HIGH https://t.co/R7xh3ehdZp

WolfgangSesin

New post from https://t.co/uXvPWJPHkR (CVE-2021-33034 (debian_linux, fedora, linux_kernel)) has been published on https://t.co/VAJOGZFHV7

threatintelctr

NEW: CVE-2021-33034 In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. Severity: HIGH https://t.co/R7xh3ezndx

RemotelyAlerts

Severity: | In the Linux kernel before 5.12.4, net/b... | CVE-2021-33034 | Link for more: https://t.co/cJwl2WqQ9G

LinInfoSec

Debian - CVE-2021-33034: https://t.co/oNREz87dCK

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13 Aug 2026 19:32Current
7.5High risk
Vulners AI Score7.5
CVSS 24.6
CVSS 3.17.8
EPSS0.00819
CWE-416
linuxkernelnetbluetoothhci_event.cuse-after-freevulnerabilitycve-2021-33034
636