{"id":"CVE-2025-38344","summary":"ACPICA: fix acpi parse and parseext cache leaks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: fix acpi parse and parseext cache leaks\n\nACPICA commit 8829e70e1360c81e7a5a901b5d4f48330e021ea5\n\nI'm Seunghun Han, and I work for National Security Research Institute of\nSouth Korea.\n\nI have been doing a research on ACPI and found an ACPI cache leak in ACPI\nearly abort cases.\n\nBoot log of ACPI cache leak is as follows:\n[    0.352414] ACPI: Added _OSI(Module Device)\n[    0.353182] ACPI: Added _OSI(Processor Device)\n[    0.353182] ACPI: Added _OSI(3.0 _SCP Extensions)\n[    0.353182] ACPI: Added _OSI(Processor Aggregator Device)\n[    0.356028] ACPI: Unable to start the ACPI Interpreter\n[    0.356799] ACPI Error: Could not remove SCI handler (20170303/evmisc-281)\n[    0.360215] kmem_cache_destroy Acpi-State: Slab cache still has objects\n[    0.360648] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W\n4.12.0-rc4-next-20170608+ #10\n[    0.361273] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS\nvirtual_box 12/01/2006\n[    0.361873] Call Trace:\n[    0.362243]  ? dump_stack+0x5c/0x81\n[    0.362591]  ? kmem_cache_destroy+0x1aa/0x1c0\n[    0.362944]  ? acpi_sleep_proc_init+0x27/0x27\n[    0.363296]  ? acpi_os_delete_cache+0xa/0x10\n[    0.363646]  ? acpi_ut_delete_caches+0x6d/0x7b\n[    0.364000]  ? acpi_terminate+0xa/0x14\n[    0.364000]  ? acpi_init+0x2af/0x34f\n[    0.364000]  ? __class_create+0x4c/0x80\n[    0.364000]  ? video_setup+0x7f/0x7f\n[    0.364000]  ? acpi_sleep_proc_init+0x27/0x27\n[    0.364000]  ? do_one_initcall+0x4e/0x1a0\n[    0.364000]  ? kernel_init_freeable+0x189/0x20a\n[    0.364000]  ? rest_init+0xc0/0xc0\n[    0.364000]  ? kernel_init+0xa/0x100\n[    0.364000]  ? ret_from_fork+0x25/0x30\n\nI analyzed this memory leak in detail. I found that “Acpi-State” cache and\n“Acpi-Parse” cache were merged because the size of cache objects was same\nslab cache size.\n\nI finally found “Acpi-Parse” cache and “Acpi-parse_ext” cache were leaked\nusing SLAB_NEVER_MERGE flag in kmem_cache_create() function.\n\nReal ACPI cache leak point is as follows:\n[    0.360101] ACPI: Added _OSI(Module Device)\n[    0.360101] ACPI: Added _OSI(Processor Device)\n[    0.360101] ACPI: Added _OSI(3.0 _SCP Extensions)\n[    0.361043] ACPI: Added _OSI(Processor Aggregator Device)\n[    0.364016] ACPI: Unable to start the ACPI Interpreter\n[    0.365061] ACPI Error: Could not remove SCI handler (20170303/evmisc-281)\n[    0.368174] kmem_cache_destroy Acpi-Parse: Slab cache still has objects\n[    0.369332] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W\n4.12.0-rc4-next-20170608+ #8\n[    0.371256] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS\nvirtual_box 12/01/2006\n[    0.372000] Call Trace:\n[    0.372000]  ? dump_stack+0x5c/0x81\n[    0.372000]  ? kmem_cache_destroy+0x1aa/0x1c0\n[    0.372000]  ? acpi_sleep_proc_init+0x27/0x27\n[    0.372000]  ? acpi_os_delete_cache+0xa/0x10\n[    0.372000]  ? acpi_ut_delete_caches+0x56/0x7b\n[    0.372000]  ? acpi_terminate+0xa/0x14\n[    0.372000]  ? acpi_init+0x2af/0x34f\n[    0.372000]  ? __class_create+0x4c/0x80\n[    0.372000]  ? video_setup+0x7f/0x7f\n[    0.372000]  ? acpi_sleep_proc_init+0x27/0x27\n[    0.372000]  ? do_one_initcall+0x4e/0x1a0\n[    0.372000]  ? kernel_init_freeable+0x189/0x20a\n[    0.372000]  ? rest_init+0xc0/0xc0\n[    0.372000]  ? kernel_init+0xa/0x100\n[    0.372000]  ? ret_from_fork+0x25/0x30\n[    0.388039] kmem_cache_destroy Acpi-parse_ext: Slab cache still has objects\n[    0.389063] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W\n4.12.0-rc4-next-20170608+ #8\n[    0.390557] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS\nvirtual_box 12/01/2006\n[    0.392000] Call Trace:\n[    0.392000]  ? dump_stack+0x5c/0x81\n[    0.392000]  ? kmem_cache_destroy+0x1aa/0x1c0\n[    0.392000]  ? acpi_sleep_proc_init+0x27/0x27\n[    0.392000]  ? acpi_os_delete_cache+0xa/0x10\n[    0.392000]  ? acpi_ut_delete_caches+0x6d/0x7b\n[    0.392000]  ? acpi_terminate+0xa/0x14\n[    0.392000]  ? acpi_init+0x2af/0x3\n---truncated---","modified":"2026-04-16T04:30:46.500412734Z","published":"2025-07-10T08:15:12.791Z","related":["SUSE-SU-2025:02853-1","SUSE-SU-2025:02923-1","SUSE-SU-2025:02969-1","SUSE-SU-2025:02996-1","SUSE-SU-2025:02997-1","SUSE-SU-2025:03011-1","SUSE-SU-2025:03023-1","SUSE-SU-2025:20577-1","SUSE-SU-2025:20586-1","SUSE-SU-2025:20601-1","SUSE-SU-2025:20602-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","openSUSE-SU-2025:20081-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38344.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a119fdaed67566aa3e0b5222dced4d08bbce463"},{"type":"WEB","url":"https://git.kernel.org/stable/c/198c2dab022e5e94a99fff267b669d693bc7bb49"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1e0e629e88b1f7751ce69bf70cda6d1598d45271"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1fee4324b5660de080cefc3fc91c371543bdb8f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3e0c59180ec83bdec43b3d3482cff23d86d380d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/41afebc9a0762aafc35d2df88f4e1b798155a940"},{"type":"WEB","url":"https://git.kernel.org/stable/c/960236150cd3f08e13b397dd5ae4ccf7a2986c00"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bed18f0bdcd6737a938264a59d67923688696fc4"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38344.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38344"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"88ac00f5a841dcfc5c682000f4a6add0add8caac"},{"fixed":"1e0e629e88b1f7751ce69bf70cda6d1598d45271"},{"fixed":"41afebc9a0762aafc35d2df88f4e1b798155a940"},{"fixed":"960236150cd3f08e13b397dd5ae4ccf7a2986c00"},{"fixed":"0a119fdaed67566aa3e0b5222dced4d08bbce463"},{"fixed":"1fee4324b5660de080cefc3fc91c371543bdb8f6"},{"fixed":"198c2dab022e5e94a99fff267b669d693bc7bb49"},{"fixed":"3e0c59180ec83bdec43b3d3482cff23d86d380d0"},{"fixed":"bed18f0bdcd6737a938264a59d67923688696fc4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38344.json"}}],"schema_version":"1.7.5"}