In the Linux kernel, the following vulnerability has been resolved:
blk_iocost: fix more out of bound shifts
Recently running UBSAN caught few out of bound shifts in the ioc_forgive_debts() function:
UBSAN: shift-out-of-bounds in block/blk-iocost.c:2142:38 shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long long') ... UBSAN: shift-out-of-bounds in block/blk-iocost.c:2144:30 shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long long') ... Call Trace: <IRQ> dump_stack_lvl+0xca/0x130 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 ? __lock_acquire+0x6441/0x7c10 ioc_timer_fn+0x6cec/0x7750 ? blk_iocost_init+0x720/0x720 ? call_timer_fn+0x5d/0x470 call_timer_fn+0xfa/0x470 ? blk_iocost_init+0x720/0x720 __run_timer_base+0x519/0x700 ...
Actual impact of this issue was not identified but I propose to fix the undefined behaviour. The proposed fix to prevent those out of bound shifts consist of precalculating exponent before using it the shift operations by taking min value from the actual exponent and maximum possible number of bits.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade kernel-develUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade python-perfUpgrade kernel-livepatch-5.10.227-219.884Upgrade kernelUpgrade perfUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-livepatch-5.15.168-114.166Upgrade kernel-tools-devel | Mar 14, 2025 | Oct 21, 2024 |
| Amazon_linux_2023 | — | Upgrade python3-perfUpgrade kernel-develUpgrade kernel-modules-extraUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade perfUpgrade kernel-tools-develUpgrade kernel-modules-extra-commonUpgrade kernel-toolsUpgrade kernel-livepatch-6.1.115-126.197Upgrade perf-debuginfoUpgrade kernel-headersUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-libbpf-develUpgrade kernel-libbpfUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernelUpgrade kernel-debuginfo | Mar 27, 2025 | Oct 21, 2024 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Nov 11, 2024 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-toolsUpgrade bpftool | Feb 11, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel | Feb 11, 2025 | Oct 21, 2024 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | May 15, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-image-oem-20.04cUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-oem-20.04bUpgrade linux-image-5.15.0-127-generic-lpaeUpgrade linux-image-5.15.0-1071-intel-iotgUpgrade linux-image-5.15.0-1073-awsUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-oem-24.04Upgrade linux-image-virtualUpgrade linux-image-gkeopUpgrade linux-image-5.15.0-1066-ibmUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-azure-lts-22.04Upgrade linux-image-genericUpgrade linux-image-5.15.0-1072-gcpUpgrade linux-image-oem-22.04cUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-gkeUpgrade linux-image-6.8.0-1022-nvidiaUpgrade linux-image-6.8.0-1025-azure-fdeUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1025-azureUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-oem-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.0-1024-oemUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1019-raspiUpgrade linux-image-5.15.0-1070-gkeUpgrade linux-image-oem-22.04dUpgrade linux-image-intelUpgrade linux-image-lowlatency-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-20.04Upgrade linux-image-oem-24.04bUpgrade linux-image-6.8.0-1020-oracle-64kUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-5.15.0-1056-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.11.0-1015-oemUpgrade linux-image-gkeop-5.15Upgrade linux-image-6.11.0-1009-awsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-57-generic-64kUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.8.0-57-genericUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-1071-oracleUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-5.15.0-127-lowlatencyUpgrade linux-image-6.8.0-1024-gcpUpgrade linux-image-azureUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1022-nvidia-64kUpgrade linux-image-6.8.0-1023-awsUpgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-6.8.0-1020-oracleUpgrade linux-image-5.15.0-127-lowlatency-64kUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-oracleUpgrade linux-image-ibmUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-54-generic-64kUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-6.8.0-1019-gkeUpgrade linux-image-5.15.0-1068-nvidiaUpgrade linux-image-5.15.0-127-generic-64kUpgrade linux-image-kvmUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-realtimeUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-oem-20.04dUpgrade linux-image-oem-22.04bUpgrade linux-image-gke-5.15Upgrade linux-image-6.8.0-54-lowlatency-64kUpgrade linux-image-6.8.0-1022-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-127-genericUpgrade linux-image-5.15.0-1039-xilinx-zynqmpUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.11.0-1009-azureUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-aws-lts-24.04Upgrade linux-image-5.15.0-1068-nvidia-lowlatencyUpgrade linux-image-awsUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.8.0-1022-nvidia-lowlatencyUpgrade linux-image-6.8.0-54-genericUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1006-gkeopUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-gcpUpgrade linux-image-6.8.0-54-lowlatencyUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-5.15.0-1066-raspiUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-oem-22.04aUpgrade linux-image-ibm-classicUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-azure-cvmUpgrade linux-image-6.8.0-1022-ibmUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-5.15.0-1070-kvmUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-6.8.0-1024-gcp-64kUpgrade linux-image-raspiUpgrade linux-image-oem-24.04aUpgrade linux-image-ibm-lts-24.04 | Dec 18, 2024 | Oct 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Oct 21, 2024 |
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