Vulnerability · Published Nov 23, 2022 · Assigned by Google
CVE-2022-42896Info Leak in l2cap_core in the Linux Kernel
High 8.0
In plain English
A high-severity use-after-free in Linux Kernel from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)2.5%top 15.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively) remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within proximity of the victim. We recommend upgrading past commit https://www.google.com/url https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4 https://www.google.com/url
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | bpftool | 7.0.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-64k-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-abi-stablelists | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-core | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-cross-headers | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-debug | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-debug-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-debug-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-debug-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-debug-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-debug-uki-virt | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-devel | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-doc | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-doc | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-modules | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-rt | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug-devel | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug-kvm | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug-modules | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:9 | kernel-rt-debug-modules-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-debug-modules-extra | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-devel | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-kvm | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-modules | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:9 | kernel-rt-modules-core | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux:9 | kernel-rt-modules-extra | 5.14.0-284.11.1.rt14.296.el9_2 | ALSA-2023:2148 |
| AlmaLinux:8 | kernel-tools | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-tools | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-tools-libs | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-tools-libs-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-uki-virt | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-zfcpdump | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-zfcpdump-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-zfcpdump-devel | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-zfcpdump-devel-matched | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-zfcpdump-modules | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | kernel-zfcpdump-modules-core | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | kernel-zfcpdump-modules-extra | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | perf | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | perf | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:8 | python3-perf | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
| AlmaLinux:9 | python3-perf | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| AlmaLinux:9 | rtla | 5.14.0-284.11.1.el9_2 | ALSA-2023:2458 |
| Debian:12 | linux | 6.0.10-1 | DEBIAN-CVE-2022-42896 |
| Debian:13 | linux | 6.0.10-1 | DEBIAN-CVE-2022-42896 |
| Debian:14 | linux | 6.0.10-1 | DEBIAN-CVE-2022-42896 |
| Rocky Linux:8 | kernel | 0:4.18.0-477.21.1.el8_8 | RLSA-2023:4517 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-477.21.1.rt7.284.el8_8 | RLSA-2023:4541 |
| Ubuntu:22.04:LTS | linux | 5.15.0-58.64 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux | 5.15.0-58.64 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1028.32 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1028.32 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1031.38 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1031.38 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1031.38.1 | USN-5831-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1031.38.1 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1027.34 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1027.34 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1027.32 | USN-5860-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1027.32 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1013.17 | USN-5814-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1013.17 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-32.33~22.04.1 | USN-5879-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-32.33~22.04.1 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1023.26 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1023.26 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1023.28 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1023.28 | USN-5814-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1026.31 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1026.31 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-58.64 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-58.64 | USN-5814-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1017.17 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1025.26 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1025.26 | USN-5783-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1008.8 | USN-5780-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1012.12 | USN-5914-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1012.12 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1027.33 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1027.33 | USN-5803-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1023.25 | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1023.25 | USN-5803-1 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2022-42896 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2022-42896 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | 3.0.0 – through 711f8c3fb3db61897080468586b970c87c61d9e4 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N