In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix possible memleak when register 'hctx' failed
There's issue as follows when do fault injection test: unreferenced object 0xffff888132a9f400 (size 512): comm "insmod", pid 308021, jiffies 4324277909 (age 509.733s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 f4 a9 32 81 88 ff ff ...........2.... 08 f4 a9 32 81 88 ff ff 00 00 00 00 00 00 00 00 ...2............ backtrace: [<00000000e8952bb4>] kmalloc_node_trace+0x22/0xa0 [<00000000f9980e0f>] blk_mq_alloc_and_init_hctx+0x3f1/0x7e0 [<000000002e719efa>] blk_mq_realloc_hw_ctxs+0x1e6/0x230 [<000000004f1fda40>] blk_mq_init_allocated_queue+0x27e/0x910 [<00000000287123ec>] __blk_mq_alloc_disk+0x67/0xf0 [<00000000a2a34657>] 0xffffffffa2ad310f [<00000000b173f718>] 0xffffffffa2af824a [<0000000095a1dabb>] do_one_initcall+0x87/0x2a0 [<00000000f32fdf93>] do_init_module+0xdf/0x320 [<00000000cbe8541e>] load_module+0x3006/0x3390 [<0000000069ed1bdb>] __do_sys_finit_module+0x113/0x1b0 [<00000000a1a29ae8>] do_syscall_64+0x35/0x80 [<000000009cd878b0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
Fault injection context as follows: kobject_add blk_mq_register_hctx blk_mq_sysfs_register blk_register_queue device_add_disk null_add_dev.part.0 [null_blk]
As 'blk_mq_register_hctx' may already add some objects when failed halfway, but there isn't do fallback, caller don't know which objects add failed. To solve above issue just do fallback when add objects failed halfway in 'blk_mq_register_hctx'.
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 kernelUpgrade kernel-livepatch-4.14.304-226.531Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.165-143.735Upgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade bpftoolUpgrade kernel-livepatch-5.15.86-53.137Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-develUpgrade perfUpgrade python-perfUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-tools | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 3, 2025 | Oct 3, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-oracle-5.4Upgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-intel-iotgUpgrade linux-xilinx-zynqmpUpgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-ibm-5.4Upgrade linux-gcp-5.4Upgrade linux-gkeUpgrade linux-riscv-5.15Upgrade linux-gcp-fipsUpgrade linuxUpgrade linux-oracle-5.15Upgrade linux-raspi-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-fipsUpgrade linux-nvidiaUpgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-raspiUpgrade linux-hweUpgrade linux-bluefieldUpgrade linux-azure-fde-5.15Upgrade linux-awsUpgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-ibmUpgrade linux-gcp-4.15Upgrade linux-aws-5.15Upgrade linux-iotUpgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linux-oracleUpgrade linux-azure-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-4.15Upgrade linux-realtimeUpgrade linux-aws-5.4Upgrade linux-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-azure-5.15Upgrade linux-aws-hwe | Oct 10, 2025 | Oct 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 1, 2025 |
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