In the Linux kernel, the following vulnerability has been resolved:
scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()
When executing SMP task failed, the smp_execute_task_sg() calls del_timer() to delete "slow_task->timer". However, if the timer handler sas_task_internal_timedout() is running, the del_timer() in smp_execute_task_sg() will not stop it and a UAF will happen. The process is shown below:
(thread 1) | (thread 2) smp_execute_task_sg() | sas_task_internal_timedout() ... | del_timer() | ... | ... sas_free_task(task) | kfree(task->slow_task) //FREE| | task->slow_task->... //USE
Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure the timer handler have finished before the "task->slow_task" is deallocated.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.10.155-138.670Upgrade kernel-livepatch-5.15.75-48.135Upgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade bpftoolUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade python-perf-debuginfoUpgrade python-perfUpgrade kernel-toolsUpgrade perfUpgrade kernel-headersUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-livepatch-4.14.355-280.706Upgrade kernel-tools-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 3, 2025 | Oct 3, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade bpftoolUpgrade python3-perf | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-nvidiaUpgrade linux-kvmUpgrade linux-hwe-5.4Upgrade linux-gkeopUpgrade linux-gcp-5.15Upgrade linux-aws-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-azureUpgrade linux-gcpUpgrade linux-azure-5.15Upgrade linux-gcp-5.4Upgrade linux-oracleUpgrade linux-ibmUpgrade linux-iotUpgrade linux-hwe-5.15Upgrade linux-azure-fipsUpgrade linux-xilinx-zynqmpUpgrade linux-awsUpgrade linux-azure-fdeUpgrade linux-fipsUpgrade linux-aws-5.15Upgrade linux-bluefieldUpgrade linux-intel-iotgUpgrade linux-ibm-5.4Upgrade linux-gkeUpgrade linux-realtimeUpgrade linuxUpgrade linux-oracle-5.4Upgrade linux-lowlatencyUpgrade linux-riscv-5.15Upgrade linux-raspi-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-oracle-5.15Upgrade linux-raspiUpgrade linux-aws-5.4 | 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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