In the Linux kernel, the following vulnerability has been resolved:
tty: fix out-of-bounds access in tty_driver_lookup_tty()
When specifying an invalid console= device like console=tty3270, tty_driver_lookup_tty() returns the tty struct without checking whether index is a valid number.
To reproduce:
qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \ -kernel ../linux-build-x86/arch/x86/boot/bzImage \ -append "console=ttyS0 console=tty3270"
This crashes with:
[ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef [ 0.771265] #PF: supervisor read access in kernel mode [ 0.771773] #PF: error_code(0x0000) - not-present page [ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI [ 0.774878] RIP: 0010:tty_open+0x268/0x6f0 [ 0.784013] chrdev_open+0xbd/0x230 [ 0.784444] ? cdev_device_add+0x80/0x80 [ 0.784920] do_dentry_open+0x1e0/0x410 [ 0.785389] path_openat+0xca9/0x1050 [ 0.785813] do_filp_open+0xaa/0x150 [ 0.786240] file_open_name+0x133/0x1b0 [ 0.786746] filp_open+0x27/0x50 [ 0.787244] console_on_rootfs+0x14/0x4d [ 0.787800] kernel_init_freeable+0x1e4/0x20d [ 0.788383] ? rest_init+0xc0/0xc0 [ 0.788881] kernel_init+0x11/0x120 [ 0.789356] ret_from_fork+0x22/0x30
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.10.173-154.642Upgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-livepatch-4.14.309-231.529Upgrade kernel-develUpgrade perfUpgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade kernel-toolsUpgrade python-perfUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.102-61.139Upgrade bpftool-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-debuginfoUpgrade kernel-libbpf-develUpgrade python3-perf-debuginfoUpgrade kernel-libbpfUpgrade kernelUpgrade kernel-libbpf-staticUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-tools-develUpgrade kernel-livepatch-6.1.19-30.43Upgrade kernel-toolsUpgrade python3-perfUpgrade perf-debuginfo | Feb 20, 2026 | Dec 30, 2025 |
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-kvmUpgrade linux-azure-5.15Upgrade linux-gcp-5.4Upgrade linuxUpgrade linux-azure-fipsUpgrade linux-iotUpgrade linux-gkeopUpgrade linux-oracleUpgrade linux-riscv-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-ibm-5.4Upgrade linux-gcp-fipsUpgrade linux-aws-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegra-igxUpgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-hwe-5.4Upgrade linux-ibmUpgrade linux-gcpUpgrade linux-azure-5.4Upgrade linux-raspi-5.4Upgrade linux-azure-fdeUpgrade linux-ibm-5.15Upgrade linux-aws-5.15Upgrade linux-oracle-5.4Upgrade linux-bluefieldUpgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-nvidia-tegraUpgrade linux-intel-iotg-5.15Upgrade linux-realtimeUpgrade linux-gcp-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-gkeUpgrade linux-aws-5.4Upgrade linux-raspiUpgrade linux-fipsUpgrade linux-hwe-5.15Upgrade linux-lowlatency | Jan 6, 2026 | Jan 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 30, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub