CVE-2021-33034

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3

https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1

https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl

https://lists.fedoraproject.org/archives/list/[email protected]/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Details

Source: MITRE

Published: 2021-05-14

Updated: 2021-06-23

Type: CWE-416

Risk Information

CVSS v2

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (76 total)

IDNameProductFamilySeverity
153131Ubuntu 20.04 LTS : Linux kernel (KVM) vulnerabilities (USN-5000-2)NessusUbuntu Local Security Checks
high
153127Ubuntu 21.04 : Linux kernel (KVM) vulnerabilities (USN-4997-2)NessusUbuntu Local Security Checks
medium
152313EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2272)NessusHuawei Local Security Checks
high
152308EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2246)NessusHuawei Local Security Checks
high
152167SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1)NessusSuSE Local Security Checks
high
152089Scientific Linux Security Update : kernel on SL7.x x86_64 (2021:2725)NessusScientific Linux Local Security Checks
high
152055SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2451-1)NessusSuSE Local Security Checks
high
152003RHEL 8 : Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7] (Important) (RHSA-2021:2736)NessusRed Hat Local Security Checks
high
151986SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2421-1)NessusSuSE Local Security Checks
high
151979CentOS 7 : kernel (CESA-2021:2725)NessusCentOS Local Security Checks
high
151929RHEL 7 : RHV-H security update (redhat-virtualization-host) 4.3.17 (Important) (RHSA-2021:2737)NessusRed Hat Local Security Checks
high
151926Oracle Linux 7 : kernel (ELSA-2021-2725)NessusOracle Linux Local Security Checks
high
151920Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-5018-1)NessusUbuntu Local Security Checks
high
151907Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-5016-1)NessusUbuntu Local Security Checks
high
151897Slackware 14.2 : Slackware 14.2 kernel (SSA:2021-202-01)NessusSlackware Local Security Checks
high
151889RHEL 7 : kernel (RHSA-2021:2728)NessusRed Hat Local Security Checks
high
151888RHEL 7 : kernel (RHSA-2021:2725)NessusRed Hat Local Security Checks
high
151887RHEL 7 : kpatch-patch (RHSA-2021:2729)NessusRed Hat Local Security Checks
high
151886RHEL 7 : kernel-rt (RHSA-2021:2726)NessusRed Hat Local Security Checks
high
151878SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2406-1)NessusSuSE Local Security Checks
high
151872RHEL 8 : kpatch-patch (RHSA-2021:2720)NessusRed Hat Local Security Checks
high
151867RHEL 7 : kernel (RHSA-2021:2730)NessusRed Hat Local Security Checks
high
151863RHEL 7 : kpatch-patch (RHSA-2021:2727)NessusRed Hat Local Security Checks
high
151859RHEL 7 : kernel (RHSA-2021:2734)NessusRed Hat Local Security Checks
high
151858RHEL 7 : kernel (RHSA-2021:2732)NessusRed Hat Local Security Checks
high
151857RHEL 8 : kernel (RHSA-2021:2718)NessusRed Hat Local Security Checks
high
151856RHEL 8 : kernel-rt (RHSA-2021:2719)NessusRed Hat Local Security Checks
high
151843RHEL 7 : kpatch-patch (RHSA-2021:2731)NessusRed Hat Local Security Checks
high
151842RHEL 7 : kernel (RHSA-2021:2733)NessusRed Hat Local Security Checks
high
151793Amazon Linux 2 : kernel (ALAS-2021-1685)NessusAmazon Linux Local Security Checks
medium
151756openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1977-1)NessusSuSE Local Security Checks
critical
151730openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1975-1)NessusSuSE Local Security Checks
critical
151690Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9362)NessusOracle Linux Local Security Checks
high
151689Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9363)NessusOracle Linux Local Security Checks
high
151570EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-2195)NessusHuawei Local Security Checks
high
151562EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-2183)NessusHuawei Local Security Checks
high
151529Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9351)NessusOracle Linux Local Security Checks
high
151506Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9349)NessusOracle Linux Local Security Checks
high
151464OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0022)NessusOracleVM Local Security Checks
medium
151454RHEL 8 : kernel (RHSA-2021:2666)NessusRed Hat Local Security Checks
medium
151453RHEL 8 : kpatch-patch (RHSA-2021:2668)NessusRed Hat Local Security Checks
high
151365CentOS 8 : kernel (CESA-2021:2570)NessusCentOS Local Security Checks
medium
151281Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9346)NessusOracle Linux Local Security Checks
medium
151280openSUSE 15 Security Update : kernel (openSUSE-SU-2021:0947-1)NessusSuSE Local Security Checks
high
151218Oracle Linux 8 : kernel (ELSA-2021-2570)NessusOracle Linux Local Security Checks
medium
151206SUSE SLES15 Security Update : kernel (Live Patch 0 for SLE 15 SP3) (SUSE-SU-2021:2198-1)NessusSuSE Local Security Checks
high
151205SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2208-1)NessusSuSE Local Security Checks
high
151138RHEL 8 : kernel (RHSA-2021:2570)NessusRed Hat Local Security Checks
medium
151137RHEL 8 : kernel-rt (RHSA-2021:2599)NessusRed Hat Local Security Checks
medium
151115RHEL 8 : kpatch-patch (RHSA-2021:2563)NessusRed Hat Local Security Checks
high
150985Debian DLA-2689-1 : linux security updateNessusDebian Local Security Checks
high
150984Debian DLA-2690-1 : linux-4.19 security updateNessusDebian Local Security Checks
high
150957Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5000-1)NessusUbuntu Local Security Checks
high
150955Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5001-1)NessusUbuntu Local Security Checks
medium
150953Ubuntu 21.04 : Linux kernel vulnerabilities (USN-4997-1)NessusUbuntu Local Security Checks
medium
150928SUSE SLES12 Security Update : kernel (Live Patch 39 for SLE 12 SP3) (SUSE-SU-2021:2026-1)NessusSuSE Local Security Checks
high
150927SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1975-1)NessusSuSE Local Security Checks
critical
150921Photon OS 4.0: Linux PHSA-2021-4.0-0047NessusPhotonOS Local Security Checks
high
150908Photon OS 3.0: Linux PHSA-2021-3.0-0254NessusPhotonOS Local Security Checks
high
150901SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1977-1)NessusSuSE Local Security Checks
critical
150900SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 11 for SLE 15 SP2) (SUSE-SU-2021:2025-1)NessusSuSE Local Security Checks
high
150886SUSE SLES12 Security Update : kernel (Live Patch 38 for SLE 12 SP3) (SUSE-SU-2021:2042-1)NessusSuSE Local Security Checks
high
150883SUSE SLES15 Security Update : kernel (Live Patch 13 for SLE 15 SP2) (SUSE-SU-2021:2027-1)NessusSuSE Local Security Checks
high
150882SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 18 for SLE 12 SP5) (SUSE-SU-2021:2020-1)NessusSuSE Local Security Checks
high
150881SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 23 for SLE 15) (SUSE-SU-2021:2060-1)NessusSuSE Local Security Checks
high
150879SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 12 for SLE 15 SP2) (SUSE-SU-2021:2067-1)NessusSuSE Local Security Checks
high
150878SUSE SLES15 Security Update : kernel (Live Patch 24 for SLE 15) (SUSE-SU-2021:2057-1)NessusSuSE Local Security Checks
high
150696SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1888-1)NessusSuSE Local Security Checks
high
150687SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1899-1)NessusSuSE Local Security Checks
high
150472SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2021:1913-1)NessusSuSE Local Security Checks
high
150470SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1912-1)NessusSuSE Local Security Checks
high
150413SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1887-1)NessusSuSE Local Security Checks
high
150407SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1890-1)NessusSuSE Local Security Checks
high
150401SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1889-1)NessusSuSE Local Security Checks
high
150396SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1891-1)NessusSuSE Local Security Checks
high
150315openSUSE Security Update : the Linux Kernel (openSUSE-2021-843)NessusSuSE Local Security Checks
high