Description
An issue was discovered in the Linux kernel through 5.16-rc6. lkdtm_ARRAY_BOUNDS in drivers/misc/lkdtm/bugs.c lacks check of the return value of kmalloc() and will cause the null pointer dereference.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Kernel | Linux 5.16-rc6 | — |
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 | 5.18.5-1 | — |
| Debian 13 | linux | 5.18.5-1 | — |
| Debian 12 | linux | 5.18.5-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-48.54 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1020.24 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1020.25 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1024.30.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1018.24 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1016.19 | — |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1003.5 | — |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1015.17 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1016.21 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1018.22 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1007.7 | — |
| Ubuntu 22.04 LTS | linux-oem-5.17 | 5.17.0-1013.14 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1018.23 | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1020.24~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1020.25~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1020.25~20.04.1.1 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1018.24~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke-5.15 | 5.15.0-1016.19~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-48.54~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1016.21~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oem-5.14 | 5.14.0-1045.51 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1018.23~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1019.22~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1021.21 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.41.1 | SUSE-SU-2023:0149-1 |
| SLES 15 SP4 | kernel-azure +2 | 5.14.21-150400.14.31.1 | SUSE-SU-2023:0146-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.41.1.150400.24.15.1 | SUSE-SU-2023:0149-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.41.1 | SUSE-SU-2023:0149-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.41.1.150400.24.15.1 | SUSE-SU-2023:0149-1 |
| SLE Micro 5.3 | kernel-rt | 5.14.21-150400.15.8.1 | SUSE-SU-2023:0147-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.41.1 | SUSE-SU-2023:0149-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_2 | 1-150400.1.3.1 | SUSE-SU-2023:0147-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_7 | 1-150400.9.3.1 | SUSE-SU-2023:0149-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +3 | 5.14.21-150400.15.8.1 | SUSE-SU-2023:0147-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | dtb-aarch64 +10 | 5.14.21-150400.24.41.1 | SUSE-SU-2023:0149-1 |
| openSUSE Leap 15.4 | kernel-azure +2 | 5.14.21-150400.14.31.1 | SUSE-SU-2023:0146-1 |
| openSUSE Leap 15.4 | kernel-default-base | 5.14.21-150400.24.41.1.150400.24.15.1 | SUSE-SU-2023:0149-1 |
| openSUSE Leap 15.4 | kernel-rt +3 | 5.14.21-150400.15.8.1 | SUSE-SU-2023:0147-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.3 | kernel-default | 5.14.21-150400.24.41.1 | SUSE-SU-2023:0149-1 |
| openSUSE Leap Micro 5.3 | kernel-default-base | 5.14.21-150400.24.41.1.150400.24.15.1 | SUSE-SU-2023:0149-1 |
| openSUSE Leap Micro 5.3 | kernel-rt | 5.14.21-150400.15.8.1 | SUSE-SU-2023:0147-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.86.1-1 | — |
Advisories 7
- WID-SEC-2022-2322 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 9, 2026
- SSA-794697 SSA-794697: Vulnerabilities in the Additional GNU/Linux Subsystem of the SIMATIC S7-1500 TM MFP Before V1.1 Siemens ProductCERT · Oct 13, 2026
- SUSE-SU-2023:0146-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0149-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0147-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-166-11 Siemens SIMATIC S7-1500 TM MFP Linux Kernel CISA ICS & IT advisories · Apr 9, 2024
- WID-SEC-2023-1432 Siemens SIMATIC S7: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 22, 2023