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-headersUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.69-37.134Upgrade kernel-debuginfoUpgrade kernel-livepatch-5.10.144-127.601Upgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade kernel-livepatch-4.14.291-218.527Upgrade perf | 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 bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perfUpgrade kernel-abi-stablelists | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linuxUpgrade linux-lts-xenialUpgrade linux-raspi-5.4Upgrade linux-gcp-5.4Upgrade linux-azure-fipsUpgrade linux-ibm-5.4Upgrade linux-iotUpgrade linux-azure-4.15Upgrade linux-awsUpgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-azureUpgrade linux-ibmUpgrade linux-raspiUpgrade linux-oracleUpgrade linux-azure-5.15Upgrade linux-azure-fde-5.15Upgrade linux-kvmUpgrade linux-intel-iotg-5.15Upgrade linux-aws-hweUpgrade linux-oracle-5.15Upgrade linux-gkeopUpgrade linux-realtimeUpgrade linux-gkeUpgrade linux-hwe-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-riscv-5.15Upgrade linux-hwe-5.15Upgrade linux-gcpUpgrade linux-aws-5.4Upgrade linux-nvidiaUpgrade linux-gcp-4.15Upgrade linux-gcp-5.15Upgrade linux-gcp-fipsUpgrade linux-fipsUpgrade linux-azure-5.4Upgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-bluefieldUpgrade linux-hweUpgrade linux-aws-fips | 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 |
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