In the Linux kernel, the following vulnerability has been resolved:
arm64: fix oops in concurrently setting insn_emulation sysctls
emulation_proc_handler() changes table->data for proc_dointvec_minmax and can generate the following Oops if called concurrently with itself:
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 | Internal error: Oops: 96000006 [#1] SMP | Call trace: | update_insn_emulation_mode+0xc0/0x148 | emulation_proc_handler+0x64/0xb8 | proc_sys_call_handler+0x9c/0xf8 | proc_sys_write+0x18/0x20 | __vfs_write+0x20/0x48 | vfs_write+0xe4/0x1d0 | ksys_write+0x70/0xf8 | __arm64_sys_write+0x20/0x28 | el0_svc_common.constprop.0+0x7c/0x1c0 | el0_svc_handler+0x2c/0xa0 | el0_svc+0x8/0x200
To fix this issue, keep the table->data as &insn->current_mode and use container_of() to retrieve the insn pointer. Another mutex is used to protect against the current_mode update but not for retrieving insn_emulation as table->data is no longer changing.
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-toolsUpgrade bpftoolUpgrade kernel-develUpgrade kernel-livepatch-4.14.291-218.527Upgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade perfUpgrade kernelUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.69-37.134Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.144-127.601 | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perf | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linux-azure-fde-5.15Upgrade linux-aws-hweUpgrade linux-gcp-fipsUpgrade linux-gkeUpgrade linux-fipsUpgrade linux-nvidiaUpgrade linux-bluefieldUpgrade linux-gcp-4.15Upgrade linux-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-azure-5.4Upgrade linux-intel-iotg-5.15Upgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-realtimeUpgrade linux-intel-iotgUpgrade linux-kvmUpgrade linux-gcpUpgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-aws-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-riscv-5.15Upgrade linux-hwe-5.4Upgrade linux-aws-5.4Upgrade linux-gkeopUpgrade linux-hweUpgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-oracleUpgrade linux-iotUpgrade linux-aws-5.15Upgrade linux-oracle-5.4Upgrade linux-azure-4.15Upgrade linux-awsUpgrade linux-azure-fipsUpgrade linux-gcp-5.4Upgrade linux-lts-xenialUpgrade linux-ibm-5.4Upgrade linux-raspi-5.4Upgrade linux | Jun 26, 2025 | Jun 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 18, 2025 |
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