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-toolsUpgrade python-perfUpgrade bpftoolUpgrade kernel-tools-develUpgrade kernelUpgrade perfUpgrade kernel-livepatch-5.10.227-219.884Upgrade kernel-livepatch-5.15.168-114.166Upgrade perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64 | Mar 14, 2025 | Oct 21, 2024 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfoUpgrade bpftoolUpgrade kernel-headersUpgrade kernel-libbpf-develUpgrade kernel-libbpfUpgrade kernelUpgrade kernel-tools-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-staticUpgrade perf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-develUpgrade kernel-modules-extra-commonUpgrade python3-perfUpgrade kernel-livepatch-6.1.115-126.197Upgrade kernel-toolsUpgrade perfUpgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64 | Mar 27, 2025 | Oct 21, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Nov 11, 2024 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernelUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel-tools-libs | Feb 11, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernelUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade python3-perf | Feb 11, 2025 | Oct 21, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | May 15, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1022-nvidia-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcpUpgrade linux-image-5.15.0-1039-xilinx-zynqmpUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-54-genericUpgrade linux-image-realtimeUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-54-lowlatency-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.8.0-1024-gcpUpgrade linux-image-azureUpgrade linux-image-6.8.0-1022-ibmUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1022-nvidia-lowlatencyUpgrade linux-image-6.8.0-1019-gkeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-azure-cvmUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1022-nvidiaUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-intelUpgrade linux-image-5.15.0-1070-gkeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-gcp-64kUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-6.8.0-57-genericUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-oem-20.04Upgrade linux-image-oem-24.04bUpgrade linux-image-oem-22.04dUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1025-azureUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1020-oracle-64kUpgrade linux-image-5.15.0-1056-gkeopUpgrade linux-image-5.15.0-127-generic-lpaeUpgrade linux-image-generic-64kUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-5.15.0-1073-awsUpgrade linux-image-oem-22.04cUpgrade linux-image-intel-iotgUpgrade linux-image-nvidia-6.8Upgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1025-azure-fdeUpgrade linux-image-5.15.0-1072-gcpUpgrade linux-image-gkeUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1019-raspiUpgrade linux-image-oem-20.04bUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-gkeop-5.15Upgrade linux-image-genericUpgrade linux-image-gkeopUpgrade linux-image-5.15.0-1066-ibmUpgrade linux-image-oem-20.04cUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1024-oemUpgrade linux-image-virtualUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-57-generic-64kUpgrade linux-image-5.15.0-1071-intel-iotgUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oem-22.04aUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1068-nvidiaUpgrade linux-image-6.8.0-54-generic-64kUpgrade linux-image-6.8.0-1006-gkeopUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-ibmUpgrade linux-image-5.15.0-1071-oracleUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-5.15.0-1066-raspiUpgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-127-generic-64kUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-5.15.0-1070-kvmUpgrade linux-image-6.8.0-1024-gcp-64kUpgrade linux-image-6.8.0-1022-nvidia-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1023-awsUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade 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-nvidia-lowlatency-64kUpgrade linux-image-kvmUpgrade linux-image-5.15.0-1068-nvidia-lowlatencyUpgrade linux-image-6.8.0-54-lowlatencyUpgrade linux-image-awsUpgrade linux-image-5.15.0-127-genericUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-gke-5.15Upgrade linux-image-oem-22.04bUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-raspiUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oem-24.04aUpgrade linux-image-5.15.0-127-lowlatency | 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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