In the Linux kernel, the following vulnerability has been resolved:
scsi: sg: Resolve soft lockup issue when opening /dev/sgX
The parameter def_reserved_size defines the default buffer size reserved for each Sg_fd and should be restricted to a range between 0 and 1,048,576 (see https://tldp.org/HOWTO/SCSI-Generic-HOWTO/proc.html). Although the function sg_proc_write_dressz enforces this limit, it is possible to bypass it by directly modifying the module parameter as shown below, which then causes a soft lockup:
echo -1 > /sys/module/sg/parameters/def_reserved_size exec 4<> /dev/sg0
watchdog: BUG: soft lockup - CPU#5 stuck for 26 seconds! [bash:537] Modules loaded: CPU: 5 UID: 0 PID: 537 Command: bash, kernel version 6.19.0-rc3+ #134, PREEMPT disabled Hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS version 1.16.1-2.fc37 dated 04/01/2014 ... Call Trace:
sg_build_reserve+0x5c/0xa0 sg_add_sfp+0x168/0x270 sg_open+0x16e/0x340 chrdev_open+0xbe/0x230 do_dentry_open+0x175/0x480 vfs_open+0x34/0xf0 do_open+0x265/0x3d0 path_openat+0x110/0x290 do_filp_open+0xc3/0x170 do_sys_openat2+0x71/0xe0 __x64_sys_openat+0x6d/0xa0 do_syscall_64+0x62/0x310 entry_SYSCALL_64_after_hwframe+0x76/0x7e
The fix is to use module_param_cb to validate and reject invalid values assigned to def_reserved_size.
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-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.209-147.245Upgrade perf-debuginfoUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernel-livepatch-5.10.258-257.1041Upgrade perfUpgrade python-perfUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernelUpgrade bpftool | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel6.18-tools-develUpgrade kernel6.18-develUpgrade kernel6.18-headersUpgrade kernel6.18-modules-extraUpgrade kernel6.18-debuginfoUpgrade kernel6.18Upgrade kernel6.18-toolsUpgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel-livepatch-6.18.33-63.124Upgrade perf6.18Upgrade bpftool6.18Upgrade python3-perf6.18-debuginfoUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-debuginfo-common-x86_64Upgrade perf6.18-debuginfoUpgrade python3-perf6.18 | Jul 13, 2026 | Jun 26, 2026 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jul 5, 2026 | Jul 5, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jun 26, 2026 |
| Ubuntu | — | Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-azureUpgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-fips-6.8Upgrade linux-image-gcpUpgrade linux-image-oem-22.04bUpgrade linux-image-oracle-5.15Upgrade linux-image-generic-64k-6.8Upgrade linux-image-azure-7.0Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-xilinxUpgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-5.15.0-186-genericUpgrade linux-image-aws-64k-5.15Upgrade linux-image-aws-fips-6.8Upgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-kvmUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oem-24.04aUpgrade linux-image-generic-6.8Upgrade linux-image-aws-lts-22.04Upgrade linux-image-virtual-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-nvidia-bosUpgrade linux-image-oem-24.04cUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-1112-awsUpgrade linux-image-oracle-64kUpgrade linux-image-raspiUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-realtime-5.15Upgrade linux-image-oem-26.04Upgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-aws-6.8Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-azure-fdeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-oem-24.04dUpgrade linux-image-azure-fipsUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-oem-24.04bUpgrade linux-image-oem-7.0Upgrade linux-image-5.15.0-1106-raspiUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-oracle-7.0Upgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-azure-fde-7.0Upgrade linux-image-awsUpgrade linux-image-gke-5.15Upgrade linux-image-aws-64k-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-7.0.0-28-realtime-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-6.8.0-1063-azureUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-generic-64k-5.15Upgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-ibm-6.8Upgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-gkeop-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-gke-64k-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-azure-fips-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-raspi-7.0Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-ibmUpgrade linux-image-gcp-5.15Upgrade linux-image-fips-5.15Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-gke-64kUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-7.0.0-28-genericUpgrade linux-image-lowlatency-5.15Upgrade linux-image-lowlatency-6.8Upgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-virtual-5.15Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-tegraUpgrade linux-image-gcp-6.8Upgrade linux-image-7.0.0-28-realtimeUpgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-raspi-6.8Upgrade linux-image-7.0.0-1003-gkeUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-gcp-7.0Upgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-generic-7.0Upgrade linux-image-azure-fde-6.8Upgrade linux-image-aws-64k-7.0Upgrade linux-image-aws-5.15Upgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-5.15.0-186-fipsUpgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-20.04Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-gke-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-azure-5.15Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-laptop-23.10Upgrade linux-image-gke-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-gkeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-azure-fips-5.15Upgrade linux-image-azure-6.8Upgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-oem-24.04Upgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-nvidia-6.8Upgrade linux-image-kvm-5.15Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-ibm-7.0Upgrade linux-image-gkeopUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-raspi-5.15Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-ibm-5.15Upgrade linux-image-gke-64k-6.8Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-generic-64k-7.0Upgrade linux-image-aws-fipsUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-7.0.0-1003-gke-64kUpgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-oem-26.04aUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-7.0.0-28-generic-64kUpgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-oracle-6.8Upgrade linux-image-7.0.0-1008-gcp-64kUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-virtual-7.0Upgrade linux-image-virtualUpgrade linux-image-intelUpgrade linux-image-realtime-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-oracleUpgrade linux-image-nvidiaUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-fipsUpgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-7.0.0-1009-oemUpgrade linux-image-xilinx-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-oem-22.04cUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-intel-iotgUpgrade linux-image-generic-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-realtimeUpgrade linux-image-generic-5.15Upgrade linux-image-azure-fde-5.15Upgrade linux-image-aws-fips-5.15Upgrade linux-image-aws-64kUpgrade linux-image-7.0.0-1008-gcpUpgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-realtime-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-6.8.0-136-fips | Jul 20, 2026 | Jun 26, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 10, 2026 | Jun 26, 2026 |
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