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 python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade kernelUpgrade kernel-livepatch-5.10.227-219.884Upgrade kernel-toolsUpgrade bpftoolUpgrade perfUpgrade kernel-tools-develUpgrade kernel-livepatch-5.15.168-114.166Upgrade python-perf | Mar 14, 2025 | Oct 21, 2024 |
| Amazon_linux_2023 | — | Upgrade perf-debuginfoUpgrade kernel-modules-extra-commonUpgrade kernel-livepatch-6.1.115-126.197Upgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade perfUpgrade kernel-develUpgrade kernel-modules-extraUpgrade kernel-debuginfo-common-aarch64Upgrade python3-perfUpgrade bpftoolUpgrade kernel-libbpf-develUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-libbpf-staticUpgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-libbpf | Mar 27, 2025 | Oct 21, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Nov 11, 2024 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-tools | Feb 11, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perf | Feb 11, 2025 | Oct 21, 2024 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | May 15, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-image-ibmUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-raspi-nolpaeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-127-lowlatency-64kUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.8.0-1020-oracleUpgrade linux-image-5.15.0-1071-oracleUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1039-xilinx-zynqmpUpgrade linux-image-azure-nvidiaUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-realtimeUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-6.8.0-54-genericUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1024-gcpUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-20.04dUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1022-nvidia-64kUpgrade linux-image-azureUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-6.8.0-1022-nvidia-lowlatencyUpgrade linux-image-6.8.0-1006-gkeopUpgrade linux-image-5.15.0-1068-nvidia-lowlatencyUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-gkeop-6.8Upgrade linux-image-5.15.0-1068-nvidiaUpgrade linux-image-6.8.0-1019-gkeUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-5.15.0-1066-raspiUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-ibm-classicUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-54-generic-64kUpgrade linux-image-raspiUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1070-kvmUpgrade linux-image-5.15.0-127-lowlatencyUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.8.0-1022-ibmUpgrade linux-image-oem-24.04aUpgrade linux-image-aws-lts-22.04Upgrade linux-image-gcpUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-127-genericUpgrade linux-image-awsUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-6.8.0-54-lowlatency-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.11.0-1009-azureUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1022-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-127-generic-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-azure-cvmUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-kvmUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-6.8.0-54-lowlatencyUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1024-gcp-64kUpgrade linux-image-6.8.0-1023-awsUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-oem-20.04Upgrade linux-image-gcp-64kUpgrade linux-image-oem-24.04bUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1056-gkeopUpgrade linux-image-gkeopUpgrade linux-image-lowlatencyUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1020-oracle-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-57-genericUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.8.0-1025-azureUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1025-azure-fdeUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-1019-raspiUpgrade linux-image-5.15.0-1070-gkeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1066-ibmUpgrade linux-image-generic-64kUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-5.15.0-127-generic-lpaeUpgrade linux-image-5.15.0-1073-awsUpgrade linux-image-nvidia-6.8Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-genericUpgrade linux-image-6.8.0-1022-nvidiaUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-virtualUpgrade linux-image-oem-24.04Upgrade linux-image-oem-20.04cUpgrade linux-image-6.8.0-57-generic-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-5.15.0-1071-intel-iotgUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-azure-lts-22.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-1072-gcpUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-gkeUpgrade linux-image-intel-iotgUpgrade linux-image-nvidiaUpgrade linux-image-gkeop-5.15Upgrade linux-image-6.11.0-1009-awsUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-6.8.0-1024-oem | 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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