--- id: CVE-2025-38344 title: 'ACPICA: fix acpi parse and parseext cache leaks' summary: |- In the Linux kernel, the following vulnerability has been resolved: ACPICA: fix acpi parse and parseext cache leaks ACPICA commit 8829e70e1360c81e7a5a901b5d4f48330e021ea5 I'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' --- ## Overview In the Linux kernel, the following vulnerability has been resolved: ACPICA: fix acpi parse and parseext cache leaks ACPICA commit 8829e70e1360c81e7a5a901b5d4f48330e021ea5 I'm Seunghun Han, and I work for National Security Research Institute of South Korea. I have been doing a research on ACPI and found an ACPI cache leak in ACPI early abort cases. Boot log of ACPI cache leak is as follows: [ 0.352414] ACPI: Added _OSI(Module Device) [ 0.353182] ACPI: Added _OSI(Processor Device) [ 0.353182] ACPI: Added _OSI(3.0 _SCP Extensions) [ 0.353182] ACPI: Added _OSI(Processor Aggregator Device) [ 0.356028] ACPI: Unable to start the ACPI Interpreter [ 0.356799] ACPI Error: Could not remove SCI handler (20170303/evmisc-281) [ 0.360215] kmem_cache_destroy Acpi-State: Slab cache still has objects [ 0.360648] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.12.0-rc4-next-20170608+ #10 [ 0.361273] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS virtual_box 12/01/2006 [ 0.361873] Call Trace: [ 0.362243] ? dump_stack+0x5c/0x81 [ 0.362591] ? kmem_cache_destroy+0x1aa/0x1c0 [ 0.362944] ? acpi_sleep_proc_init+0x27/0x27 [ 0.363296] ? acpi_os_delete_cache+0xa/0x10 [ 0.363646] ? acpi_ut_delete_caches+0x6d/0x7b [ 0.364000] ? acpi_terminate+0xa/0x14 [ 0.364000] ? acpi_init+0x2af/0x34f [ 0.364000] ? __class_create+0x4c/0x80 [ 0.364000] ? video_setup+0x7f/0x7f [ 0.364000] ? acpi_sleep_proc_init+0x27/0x27 [ 0.364000] ? do_one_initcall+0x4e/0x1a0 [ 0.364000] ? kernel_init_freeable+0x189/0x20a [ 0.364000] ? rest_init+0xc0/0xc0 [ 0.364000] ? kernel_init+0xa/0x100 [ 0.364000] ? ret_from_fork+0x25/0x30 I analyzed this memory leak in detail. I found that “Acpi-State” cache and “Acpi-Parse” cache were merged because the size of cache objects was same slab cache size. I finally found “Acpi-Parse” cache and “Acpi-parse_ext” cache were leaked using SLAB_NEVER_MERGE flag in kmem_cache_create() function. Real ACPI cache leak point is as follows: [ 0.360101] ACPI: Added _OSI(Module Device) [ 0.360101] ACPI: Added _OSI(Processor Device) [ 0.360101] ACPI: Added _OSI(3.0 _SCP Extensions) [ 0.361043] ACPI: Added _OSI(Processor Aggregator Device) [ 0.364016] ACPI: Unable to start the ACPI Interpreter [ 0.365061] ACPI Error: Could not remove SCI handler (20170303/evmisc-281) [ 0.368174] kmem_cache_destroy Acpi-Parse: Slab cache still has objects [ 0.369332] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.12.0-rc4-next-20170608+ #8 [ 0.371256] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS virtual_box 12/01/2006 [ 0.372000] Call Trace: [ 0.372000] ? dump_stack+0x5c/0x81 [ 0.372000] ? kmem_cache_destroy+0x1aa/0x1c0 [ 0.372000] ? acpi_sleep_proc_init+0x27/0x27 [ 0.372000] ? acpi_os_delete_cache+0xa/0x10 [ 0.372000] ? acpi_ut_delete_caches+0x56/0x7b [ 0.372000] ? acpi_terminate+0xa/0x14 [ 0.372000] ? acpi_init+0x2af/0x34f [ 0.372000] ? __class_create+0x4c/0x80 [ 0.372000] ? video_setup+0x7f/0x7f [ 0.372000] ? acpi_sleep_proc_init+0x27/0x27 [ 0.372000] ? do_one_initcall+0x4e/0x1a0 [ 0.372000] ? kernel_init_freeable+0x189/0x20a [ 0.372000] ? rest_init+0xc0/0xc0 [ 0.372000] ? kernel_init+0xa/0x100 [ 0.372000] ? ret_from_fork+0x25/0x30 [ 0.388039] kmem_cache_destroy Acpi-parse_ext: Slab cache still has objects [ 0.389063] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.12.0-rc4-next-20170608+ #8 [ 0.390557] Hardware name: innotek gmb_h virtual_box/virtual_box, BIOS virtual_box 12/01/2006 [ 0.392000] Call Trace: [ 0.392000] ? dump_stack+0x5c/0x81 [ 0.392000] ? kmem_cache_destroy+0x1aa/0x1c0 [ 0.392000] ? acpi_sleep_proc_init+0x27/0x27 [ 0.392000] ? acpi_os_delete_cache+0xa/0x10 [ 0.392000] ? acpi_ut_delete_caches+0x6d/0x7b [ 0.392000] ? acpi_terminate+0xa/0x14 [ 0.392000] ? acpi_init+0x2af/0x3 ---truncated--- ## 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` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.