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 perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-4.14.355-280.706Upgrade bpftool-debuginfoUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade perfUpgrade kernel-debuginfoUpgrade python-perfUpgrade kernel-livepatch-5.15.75-48.135Upgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernelUpgrade kernel-livepatch-5.10.155-138.670 | 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 python3-perfUpgrade kernel-toolsUpgrade bpftool | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-nvidiaUpgrade linux-azure-5.4Upgrade linux-azure-fipsUpgrade linux-iotUpgrade linux-aws-fipsUpgrade linux-gcp-5.4Upgrade linux-ibmUpgrade linux-hwe-5.4Upgrade linux-kvmUpgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-gcp-5.15Upgrade linux-gkeopUpgrade linux-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-azureUpgrade linux-intel-iotg-5.15Upgrade linux-gcpUpgrade linux-xilinx-zynqmpUpgrade linux-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotgUpgrade linux-oracle-5.4Upgrade linux-aws-5.4Upgrade linux-raspiUpgrade linux-lowlatencyUpgrade linux-raspi-5.4Upgrade linux-gkeUpgrade linux-realtimeUpgrade linux-aws-5.15Upgrade linux-awsUpgrade linux-bluefieldUpgrade linuxUpgrade linux-ibm-5.4Upgrade linux-oracle-5.15Upgrade linux-riscv-5.15 | 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 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub