Description
Linux Kernel Bluetooth CMTP Module Double Free Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the CMTP module. The issue results from the lack of validating the existence of an object prior to performing further free operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel. Was ZDI-CAN-11977.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Kernel | 4.15.0-118-generic | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.10.46-1 | — |
| Debian 13 | linux | 5.10.46-1 | — |
| Debian 12 | linux | 5.10.46-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +19 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-oem-5.13 | 5.13.0-1014.18 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux +10 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | linux +12 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +5 | 5.3.18-59.37.2 | SUSE-SU-2021:3941-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-38.31.1 | SUSE-SU-2021:3806-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-59.37.2.18.23.3 | SUSE-SU-2021:3941-1 |
| SLES 15 SP3 | kernel-obs-build | 5.3.18-59.37.3 | SUSE-SU-2021:3941-1 |
| SLES 15 SP3 | kernel-syms | 5.3.18-59.37.1 | SUSE-SU-2021:3941-1 |
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.75.1 | SUSE-SU-2021:3807-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.96.1.9.44.1 | SUSE-SU-2021:3933-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.96.1 | SUSE-SU-2021:3933-1 |
| SLES 15 SP1 | kernel-docs +4 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES 15 | kernel-syms +4 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.80.1 | SUSE-SU-2021:3848-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.103.1 | SUSE-SU-2021:3877-1 |
Show 28 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.161.1 | SUSE-SU-2021:3929-1 |
| SLES 11 SP4 | kernel-ec2 +5 | 3.0.101-108.138.1 | SUSE-SU-2023:0416-1 |
| SLES for SAP 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES for SAP 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.80.1 | SUSE-SU-2021:3848-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.103.1 | SUSE-SU-2021:3877-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.70.2 | SUSE-SU-2021:3992-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-59.37.2 | SUSE-SU-2021:3941-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-59.37.2.18.23.3 | SUSE-SU-2021:3941-1 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-65.2 | SUSE-SU-2021:3979-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.96.1 | SUSE-SU-2021:3933-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.96.1.9.44.1 | SUSE-SU-2021:3933-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-62.2 | SUSE-SU-2021:3978-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-59.37.2 | SUSE-SU-2021:3941-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_10 | 1-7.3.2 | SUSE-SU-2021:3941-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.96.1 | SUSE-SU-2021:3933-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_22 | 1-5.3.1 | SUSE-SU-2021:3933-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_27 | 1-3.3.1 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_26 | 1-1.3.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.103.1 | SUSE-SU-2021:3877-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_26 | 1-8.5.1 | SUSE-SU-2021:3877-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_23 | 1-6.3.1 | SUSE-SU-2021:3972-1 |
| SLE HPC 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLE HPC 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +2 | 5.3.18-65.2 | SUSE-SU-2021:3979-1 |
| SUSE Real Time Module 15 SP3 | kernel-syms-rt | 5.3.18-65.1 | SUSE-SU-2021:3979-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt | 5.3.18-62.2 | SUSE-SU-2021:3978-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt_debug +1 | 5.3.18-62.3 | SUSE-SU-2021:3978-1 |
| SUSE Real Time Module 15 SP2 | kernel-syms-rt | 5.3.18-62.1 | SUSE-SU-2021:3978-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE Enterprise Storage 6 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SUSE Enterprise Storage 6 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | dtb-aarch64 +2 | 5.3.18-59.37.1 | openSUSE-SU-2021:3941-1 |
| openSUSE Leap 15.3 | kernel-64kb +3 | 5.3.18-59.37.2 | openSUSE-SU-2021:3941-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-38.31.1 | openSUSE-SU-2021:3806-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-197.102.2 | openSUSE-SU-2021:3941-1, openSUSE-SU-2021:3876-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.37.2.18.23.3 | openSUSE-SU-2021:3941-1 |
| openSUSE Leap 15.3 | kernel-obs-build | 5.3.18-59.37.3 | openSUSE-SU-2021:3941-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.106.1.lp152.8.52.1 | openSUSE-SU-2021:1501-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.106.1 | openSUSE-SU-2021:1501-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.83.2.el7uek | ELSA-2024-12193 |
Advisories 20
- openSUSE-SU-2021:3806-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3929-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3848-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3969-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3941-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3935-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3877-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0416-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3992-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3978-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3806-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3933-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3972-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3941-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3979-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1501-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3807-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2024-12193 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 1, 2024