In the Linux kernel, the following vulnerability has been resolved:
ACPICA: Avoid undefined behavior: applying zero offset to null pointer
ACPICA commit 770653e3ba67c30a629ca7d12e352d83c2541b1e
Before this change we see the following UBSAN stack trace in Fuchsia:
#0 0x000021e4213b3302 in acpi_ds_init_aml_walk(struct acpi_walk_state*, union acpi_parse_object*, struct acpi_namespace_node*, u8*, u32, struct acpi_evaluate_info*, u8) ../../third_party/acpica/source/components/dispatcher/dswstate.c:682 <platform-bus-x86.so>+0x233302 #1.2 0x000020d0f660777f in ubsan_get_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:41 <libclang_rt.asan.so>+0x3d77f #1.1 0x000020d0f660777f in maybe_print_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:51 <libclang_rt.asan.so>+0x3d77f #1 0x000020d0f660777f in ~scoped_report() compiler-rt/lib/ubsan/ubsan_diag.cpp:387 <libclang_rt.asan.so>+0x3d77f #2 0x000020d0f660b96d in handlepointer_overflow_impl() compiler-rt/lib/ubsan/ubsan_handlers.cpp:809 <libclang_rt.asan.so>+0x4196d #3 0x000020d0f660b50d in compiler-rt/lib/ubsan/ubsan_handlers.cpp:815 <libclang_rt.asan.so>+0x4150d #4 0x000021e4213b3302 in acpi_ds_init_aml_walk(struct acpi_walk_state*, union acpi_parse_object*, struct acpi_namespace_node*, u8*, u32, struct acpi_evaluate_info*, u8) ../../third_party/acpica/source/components/dispatcher/dswstate.c:682 <platform-bus-x86.so>+0x233302 #5 0x000021e4213e2369 in acpi_ds_call_control_method(struct acpi_thread_state*, struct acpi_walk_state*, union acpi_parse_object*) ../../third_party/acpica/source/components/dispatcher/dsmethod.c:605 <platform-bus-x86.so>+0x262369 #6 0x000021e421437fac in acpi_ps_parse_aml(struct acpi_walk_state*) ../../third_party/acpica/source/components/parser/psparse.c:550 <platform-bus-x86.so>+0x2b7fac #7 0x000021e4214464d2 in acpi_ps_execute_method(struct acpi_evaluate_info*) ../../third_party/acpica/source/components/parser/psxface.c:244 <platform-bus-x86.so>+0x2c64d2 #8 0x000021e4213aa052 in acpi_ns_evaluate(struct acpi_evaluate_info*) ../../third_party/acpica/source/components/namespace/nseval.c:250 <platform-bus-x86.so>+0x22a052 #9 0x000021e421413dd8 in acpi_ns_init_one_device(acpi_handle, u32, void*, void**) ../../third_party/acpica/source/components/namespace/nsinit.c:735 <platform-bus-x86.so>+0x293dd8 #10 0x000021e421429e98 in acpi_ns_walk_namespace(acpi_object_type, acpi_handle, u32, u32, acpi_walk_callback, acpi_walk_callback, void*, void**) ../../third_party/acpica/source/components/namespace/nswalk.c:298 <platform-bus-x86.so>+0x2a9e98 #11 0x000021e4214131ac in acpi_ns_initialize_devices(u32) ../../third_party/acpica/source/components/namespace/nsinit.c:268 <platform-bus-x86.so>+0x2931ac #12 0x000021e42147c40d in acpi_initialize_objects(u32) ../../third_party/acpica/source/components/utilities/utxfinit.c:304 <platform-bus-x86.so>+0x2fc40d #13 0x000021e42126d603 in acpi::acpi_impl::initialize_acpi(acpi::acpi_impl*) ../../src/devices/board/lib/acpi/acpi-impl.cc:224 <platform-bus-x86.so>+0xed603
Add a simple check that avoids incrementing a pointer by zero, but otherwise behaves as before. Note that our findings are against ACPICA 20221020, but the same code exists on master.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-4.14.318-240.529Upgrade kernel-headersUpgrade perfUpgrade perf-debuginfoUpgrade kernel-develUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.117-72.142Upgrade kernel-tools-develUpgrade python-perfUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-livepatch-5.10.184-174.730 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernelUpgrade python3-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-headersUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-libbpf-staticUpgrade kernel-debuginfoUpgrade python3-perfUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.1.34-56.100Upgrade perfUpgrade kernel-libbpfUpgrade kernel-develUpgrade kernel-tools | Oct 16, 2025 | Sep 15, 2025 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-tools-libs | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-nvidia-tegraUpgrade linux-intel-iot-realtimeUpgrade linux-aws-5.15Upgrade linux-riscv-5.15Upgrade linux-ibm-5.15Upgrade linuxUpgrade linux-nvidia-tegra-5.15Upgrade linux-azure-fipsUpgrade linux-lowlatencyUpgrade linux-nvidia-tegra-igxUpgrade linux-gkeUpgrade linux-gcpUpgrade linux-raspi-5.4Upgrade linux-ibm-5.4Upgrade linux-gcp-5.4Upgrade linux-fipsUpgrade linux-bluefieldUpgrade linux-aws-5.4Upgrade linux-oracle-5.4Upgrade linux-gkeopUpgrade linux-azure-fdeUpgrade linux-azure-fde-5.15Upgrade linux-raspiUpgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-azureUpgrade linux-xilinx-zynqmpUpgrade linux-gcp-5.15Upgrade linux-hwe-5.15Upgrade linux-azure-5.4Upgrade linux-oracle-5.15Upgrade linux-oracleUpgrade linux-kvmUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotgUpgrade linux-aws-fipsUpgrade linux-nvidiaUpgrade linux-iotUpgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.4Upgrade linux-gcp-fipsUpgrade linux-realtime | Sep 19, 2025 | Sep 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 15, 2025 |
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