{"id":"CVE-2025-38344","title":"ACPICA: fix acpi parse and parseext cache leaks","summary":"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 Ins…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 1e0e629e88b1f7751ce69bf70cda6d1598d45271","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 41afebc9a0762aafc35d2df88f4e1b798155a940","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 960236150cd3f08e13b397dd5ae4ccf7a2986c00","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 0a119fdaed67566aa3e0b5222dced4d08bbce463","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 1fee4324b5660de080cefc3fc91c371543bdb8f6","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 198c2dab022e5e94a99fff267b669d693bc7bb49","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 3e0c59180ec83bdec43b3d3482cff23d86d380d0","Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < bed18f0bdcd6737a938264a59d67923688696fc4","Linux 2.6.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:55:06.355256Z"},"published":"2025-07-10","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:34.310Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38344","references":[{"url":"https://git.kernel.org/stable/c/1e0e629e88b1f7751ce69bf70cda6d1598d45271"},{"url":"https://git.kernel.org/stable/c/41afebc9a0762aafc35d2df88f4e1b798155a940"},{"url":"https://git.kernel.org/stable/c/960236150cd3f08e13b397dd5ae4ccf7a2986c00"},{"url":"https://git.kernel.org/stable/c/0a119fdaed67566aa3e0b5222dced4d08bbce463"},{"url":"https://git.kernel.org/stable/c/1fee4324b5660de080cefc3fc91c371543bdb8f6"},{"url":"https://git.kernel.org/stable/c/198c2dab022e5e94a99fff267b669d693bc7bb49"},{"url":"https://git.kernel.org/stable/c/3e0c59180ec83bdec43b3d3482cff23d86d380d0"},{"url":"https://git.kernel.org/stable/c/bed18f0bdcd6737a938264a59d67923688696fc4"}],"tags":["cve.org"],"epss":0.00194,"epssPercentile":0.09145,"ingestedAt":"2026-11-05T22:38:31.959Z","slug":"CVE-2025-38344","body":"## Overview\n\nIn 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---\n\n## Affected\n\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 1e0e629e88b1f7751ce69bf70cda6d1598d45271`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 41afebc9a0762aafc35d2df88f4e1b798155a940`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 960236150cd3f08e13b397dd5ae4ccf7a2986c00`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 0a119fdaed67566aa3e0b5222dced4d08bbce463`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 1fee4324b5660de080cefc3fc91c371543bdb8f6`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 198c2dab022e5e94a99fff267b669d693bc7bb49`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < 3e0c59180ec83bdec43b3d3482cff23d86d380d0`\n- `Linux >= 88ac00f5a841dcfc5c682000f4a6add0add8caac < bed18f0bdcd6737a938264a59d67923688696fc4`\n- `Linux 2.6.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}