In the Linux kernel, the following vulnerability has been resolved:
md/raid10: fix null-ptr-deref in raid10_sync_request
init_resync() inits mempool and sets conf->have_replacemnt at the beginning of sync, close_sync() frees the mempool when sync is completed.
After [1] recovery might be skipped and init_resync() is called but close_sync() is not. null-ptr-deref occurs with r10bio->dev[i].repl_bio.
The following is one way to reproduce the issue.
1) create a array, wait for resync to complete, mddev->recovery_cp is set to MaxSector. 2) recovery is woken and it is skipped. conf->have_replacement is set to 0 in init_resync(). close_sync() not called. 3) some io errors and rdev A is set to WantReplacement. 4) a new device is added and set to A's replacement. 5) recovery is woken, A have replacement, but conf->have_replacemnt is 0. r10bio->dev[i].repl_bio will not be alloced and null-ptr-deref occurs.
Fix it by not calling init_resync() if recovery skipped.
[1] commit 7e83ccbecd60 ("md/raid10: Allow skipping recovery when clean arrays are assembled")
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade perfUpgrade perf-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.117-72.142Upgrade python-perfUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernel-headers | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-libbpf-staticUpgrade kernel-tools-develUpgrade python3-perf-debuginfoUpgrade perfUpgrade kernelUpgrade python3-perfUpgrade kernel-libbpf-develUpgrade kernel-libbpfUpgrade kernel-livepatch-6.1.29-47.49Upgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-devel | Jan 12, 2026 | Dec 9, 2025 |
| Debian | — | Upgrade linux | Dec 10, 2025 | Dec 10, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-tools | Mar 17, 2026 | Mar 16, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 9, 2025 |
| Ubuntu | — | Upgrade linux-aws-5.15Upgrade linux-nvidia-tegraUpgrade linux-azure-5.4Upgrade linux-gcp-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-realtimeUpgrade linux-intel-iot-realtimeUpgrade linux-bluefieldUpgrade linux-raspi-5.4Upgrade linux-gcp-fipsUpgrade linux-nvidia-tegra-5.15Upgrade linux-gcpUpgrade linux-iotUpgrade linux-awsUpgrade linux-gkeopUpgrade linux-gcp-5.4Upgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-riscv-5.15Upgrade linux-azure-fipsUpgrade linux-nvidiaUpgrade linux-intel-iotgUpgrade linux-hwe-5.4Upgrade linux-fipsUpgrade linux-gkeUpgrade linuxUpgrade linux-oracle-5.4Upgrade linux-aws-fipsUpgrade linux-xilinx-zynqmpUpgrade linux-kvmUpgrade linux-oracleUpgrade linux-raspiUpgrade linux-azure-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-intel-iotg-5.15Upgrade linux-ibm-5.15Upgrade linux-aws-5.4Upgrade linux-hwe-5.15Upgrade linux-ibm-5.4Upgrade linux-oracle-5.15Upgrade linux-azure | Dec 11, 2025 | Dec 9, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 9, 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