In the Linux kernel, the following vulnerability has been resolved:
net: mdio: fix undefined behavior in bit shift for __mdiobus_register
Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in drivers/net/phy/mdio_bus.c:586:27 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c __mdiobus_register+0x49d/0x4e0 fixed_mdio_bus_init+0xd8/0x12d do_one_initcall+0x76/0x430 kernel_init_freeable+0x3b3/0x422 kernel_init+0x24/0x1e0 ret_from_fork+0x1f/0x30 </TASK>
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 python-perfUpgrade bpftool-debuginfoUpgrade kernel-livepatch-4.14.299-223.520Upgrade kernelUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.79-51.138Upgrade kernel-debuginfo-common-x86_64Upgrade perfUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-livepatch-5.10.155-138.670Upgrade kernel-toolsUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-devel | Jun 23, 2025 | May 1, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 1, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-tools | Sep 15, 2025 | Sep 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-toolsUpgrade python3-perf | Oct 24, 2025 | Sep 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2025 |
| Ubuntu | — | Upgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linux-gcp-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-aws-5.15Upgrade linux-nvidiaUpgrade linux-oracle-5.4Upgrade linux-intel-iotgUpgrade linux-kvmUpgrade linux-oracle-5.15Upgrade linux-gkeUpgrade linux-ibmUpgrade linux-gkeopUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-aws-hweUpgrade linux-azure-fipsUpgrade linux-lowlatencyUpgrade linux-raspiUpgrade linux-aws-5.4Upgrade linux-azure-5.15Upgrade linux-fipsUpgrade linux-oracleUpgrade linux-raspi-5.4Upgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-awsUpgrade linux-hweUpgrade linuxUpgrade linux-azure-4.15Upgrade linux-hwe-5.15Upgrade linux-ibm-5.4Upgrade linux-iotUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-4.15Upgrade linux-gcpUpgrade linux-azure-5.4Upgrade linux-azureUpgrade linux-realtime | May 6, 2025 | May 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2025 |
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