{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40037", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.153Z", "datePublished": "2025-10-28T11:48:18.274Z", "dateUpdated": "2026-05-11T21:41:15.693Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:41:15.693Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: simplefb: Fix use after free in simplefb_detach_genpds()\n\nThe pm_domain cleanup can not be devres managed as it uses struct\nsimplefb_par which is allocated within struct fb_info by\nframebuffer_alloc(). This allocation is explicitly freed by\nunregister_framebuffer() in simplefb_remove().\nDevres managed cleanup runs after the device remove call and thus can no\nlonger access struct simplefb_par.\nCall simplefb_detach_genpds() explicitly from simplefb_destroy() like\nthe cleanup functions for clocks and regulators.\n\nFixes an use after free on M2 Mac mini during\naperture_remove_conflicting_devices() using the downstream asahi kernel\nwith Debian's kernel config. For unknown reasons this started to\nconsistently dereference an invalid pointer in v6.16.3 based kernels.\n\n[ 6.736134] BUG: KASAN: slab-use-after-free in simplefb_detach_genpds+0x58/0x220\n[ 6.743545] Read of size 4 at addr ffff8000304743f0 by task (udev-worker)/227\n[ 6.750697]\n[ 6.752182] CPU: 6 UID: 0 PID: 227 Comm: (udev-worker) Tainted: G S 6.16.3-asahi+ #16 PREEMPTLAZY\n[ 6.752186] Tainted: [S]=CPU_OUT_OF_SPEC\n[ 6.752187] Hardware name: Apple Mac mini (M2, 2023) (DT)\n[ 6.752189] Call trace:\n[ 6.752190] show_stack+0x34/0x98 (C)\n[ 6.752194] dump_stack_lvl+0x60/0x80\n[ 6.752197] print_report+0x17c/0x4d8\n[ 6.752201] kasan_report+0xb4/0x100\n[ 6.752206] __asan_report_load4_noabort+0x20/0x30\n[ 6.752209] simplefb_detach_genpds+0x58/0x220\n[ 6.752213] devm_action_release+0x50/0x98\n[ 6.752216] release_nodes+0xd0/0x2c8\n[ 6.752219] devres_release_all+0xfc/0x178\n[ 6.752221] device_unbind_cleanup+0x28/0x168\n[ 6.752224] device_release_driver_internal+0x34c/0x470\n[ 6.752228] device_release_driver+0x20/0x38\n[ 6.752231] bus_remove_device+0x1b0/0x380\n[ 6.752234] device_del+0x314/0x820\n[ 6.752238] platform_device_del+0x3c/0x1e8\n[ 6.752242] platform_device_unregister+0x20/0x50\n[ 6.752246] aperture_detach_platform_device+0x1c/0x30\n[ 6.752250] aperture_detach_devices+0x16c/0x290\n[ 6.752253] aperture_remove_conflicting_devices+0x34/0x50\n...\n[ 6.752343]\n[ 6.967409] Allocated by task 62:\n[ 6.970724] kasan_save_stack+0x3c/0x70\n[ 6.974560] kasan_save_track+0x20/0x40\n[ 6.978397] kasan_save_alloc_info+0x40/0x58\n[ 6.982670] __kasan_kmalloc+0xd4/0xd8\n[ 6.986420] __kmalloc_noprof+0x194/0x540\n[ 6.990432] framebuffer_alloc+0xc8/0x130\n[ 6.994444] simplefb_probe+0x258/0x2378\n...\n[ 7.054356]\n[ 7.055838] Freed by task 227:\n[ 7.058891] kasan_save_stack+0x3c/0x70\n[ 7.062727] kasan_save_track+0x20/0x40\n[ 7.066565] kasan_save_free_info+0x4c/0x80\n[ 7.070751] __kasan_slab_free+0x6c/0xa0\n[ 7.074675] kfree+0x10c/0x380\n[ 7.077727] framebuffer_release+0x5c/0x90\n[ 7.081826] simplefb_destroy+0x1b4/0x2c0\n[ 7.085837] put_fb_info+0x98/0x100\n[ 7.089326] unregister_framebuffer+0x178/0x320\n[ 7.093861] simplefb_remove+0x3c/0x60\n[ 7.097611] platform_remove+0x60/0x98\n[ 7.101361] device_remove+0xb8/0x160\n[ 7.105024] device_release_driver_internal+0x2fc/0x470\n[ 7.110256] device_release_driver+0x20/0x38\n[ 7.114529] bus_remove_device+0x1b0/0x380\n[ 7.118628] device_del+0x314/0x820\n[ 7.122116] platform_device_del+0x3c/0x1e8\n[ 7.126302] platform_device_unregister+0x20/0x50\n[ 7.131012] aperture_detach_platform_device+0x1c/0x30\n[ 7.136157] aperture_detach_devices+0x16c/0x290\n[ 7.140779] aperture_remove_conflicting_devices+0x34/0x50\n..."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/simplefb.c"], "versions": [{"version": "92a511a568e44cf11681a2223cae4d576a1a515d", "lessThan": "b1deb39cfd614fb2f278b71011692a8dbf0f05ba", "status": "affected", "versionType": "git"}, {"version": "92a511a568e44cf11681a2223cae4d576a1a515d", "lessThan": "b6ff0d8de8452ec0e18e5bd7394c2a23e7ff7353", "status": "affected", "versionType": "git"}, {"version": "92a511a568e44cf11681a2223cae4d576a1a515d", "lessThan": "da1bb9135213744e7ec398826c8f2e843de4fb94", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/simplefb.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.53", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b1deb39cfd614fb2f278b71011692a8dbf0f05ba"}, {"url": "https://git.kernel.org/stable/c/b6ff0d8de8452ec0e18e5bd7394c2a23e7ff7353"}, {"url": "https://git.kernel.org/stable/c/da1bb9135213744e7ec398826c8f2e843de4fb94"}], "title": "fbdev: simplefb: Fix use after free in simplefb_detach_genpds()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: simplefb: Fix use after free in simplefb_detach_genpds()\n\nThe pm_domain cleanup can not be devres managed as it uses struct\nsimplefb_par which is allocated within struct fb_info by\nframebuffer_alloc(). This allocation is explicitly freed by\nunregister_framebuffer() in simplefb_remove().\nDevres managed cleanup runs after the device remove call and thus can no\nlonger access struct simplefb_par.\nCall simplefb_detach_genpds() explicitly from simplefb_destroy() like\nthe cleanup functions for clocks and regulators.\n\nFixes an use after free on M2 Mac mini during\naperture_remove_conflicting_devices() using the downstream asahi kernel\nwith Debian's kernel config. For unknown reasons this started to\nconsistently dereference an invalid pointer in v6.16.3 based kernels.\n\n[ 6.736134] BUG: KASAN: slab-use-after-free in simplefb_detach_genpds+0x58/0x220\n[ 6.743545] Read of size 4 at addr ffff8000304743f0 by task (udev-worker)/227\n[ 6.750697]\n[ 6.752182] CPU: 6 UID: 0 PID: 227 Comm: (udev-worker) Tainted: G S 6.16.3-asahi+ #16 PREEMPTLAZY\n[ 6.752186] Tainted: [S]=CPU_OUT_OF_SPEC\n[ 6.752187] Hardware name: Apple Mac mini (M2, 2023) (DT)\n[ 6.752189] Call trace:\n[ 6.752190] show_stack+0x34/0x98 (C)\n[ 6.752194] dump_stack_lvl+0x60/0x80\n[ 6.752197] print_report+0x17c/0x4d8\n[ 6.752201] kasan_report+0xb4/0x100\n[ 6.752206] __asan_report_load4_noabort+0x20/0x30\n[ 6.752209] simplefb_detach_genpds+0x58/0x220\n[ 6.752213] devm_action_release+0x50/0x98\n[ 6.752216] release_nodes+0xd0/0x2c8\n[ 6.752219] devres_release_all+0xfc/0x178\n[ 6.752221] device_unbind_cleanup+0x28/0x168\n[ 6.752224] device_release_driver_internal+0x34c/0x470\n[ 6.752228] device_release_driver+0x20/0x38\n[ 6.752231] bus_remove_device+0x1b0/0x380\n[ 6.752234] device_del+0x314/0x820\n[ 6.752238] platform_device_del+0x3c/0x1e8\n[ 6.752242] platform_device_unregister+0x20/0x50\n[ 6.752246] aperture_detach_platform_device+0x1c/0x30\n[ 6.752250] aperture_detach_devices+0x16c/0x290\n[ 6.752253] aperture_remove_conflicting_devices+0x34/0x50\n...\n[ 6.752343]\n[ 6.967409] Allocated by task 62:\n[ 6.970724] kasan_save_stack+0x3c/0x70\n[ 6.974560] kasan_save_track+0x20/0x40\n[ 6.978397] kasan_save_alloc_info+0x40/0x58\n[ 6.982670] __kasan_kmalloc+0xd4/0xd8\n[ 6.986420] __kmalloc_noprof+0x194/0x540\n[ 6.990432] framebuffer_alloc+0xc8/0x130\n[ 6.994444] simplefb_probe+0x258/0x2378\n...\n[ 7.054356]\n[ 7.055838] Freed by task 227:\n[ 7.058891] kasan_save_stack+0x3c/0x70\n[ 7.062727] kasan_save_track+0x20/0x40\n[ 7.066565] kasan_save_free_info+0x4c/0x80\n[ 7.070751] __kasan_slab_free+0x6c/0xa0\n[ 7.074675] kfree+0x10c/0x380\n[ 7.077727] framebuffer_release+0x5c/0x90\n[ 7.081826] simplefb_destroy+0x1b4/0x2c0\n[ 7.085837] put_fb_info+0x98/0x100\n[ 7.089326] unregister_framebuffer+0x178/0x320\n[ 7.093861] simplefb_remove+0x3c/0x60\n[ 7.097611] platform_remove+0x60/0x98\n[ 7.101361] device_remove+0xb8/0x160\n[ 7.105024] device_release_driver_internal+0x2fc/0x470\n[ 7.110256] device_release_driver+0x20/0x38\n[ 7.114529] bus_remove_device+0x1b0/0x380\n[ 7.118628] device_del+0x314/0x820\n[ 7.122116] platform_device_del+0x3c/0x1e8\n[ 7.126302] platform_device_unregister+0x20/0x50\n[ 7.131012] aperture_detach_platform_device+0x1c/0x30\n[ 7.136157] aperture_detach_devices+0x16c/0x290\n[ 7.140779] aperture_remove_conflicting_devices+0x34/0x50\n..."}], "id": "CVE-2025-40037", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-10-28T12:15:37.613", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1deb39cfd614fb2f278b71011692a8dbf0f05ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6ff0d8de8452ec0e18e5bd7394c2a23e7ff7353"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da1bb9135213744e7ec398826c8f2e843de4fb94"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: fbdev: simplefb: Fix use after free in simplefb_detach_genpds()", "id": "2406757", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2406757"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40037", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40037\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40037\nhttps://lore.kernel.org/linux-cve-announce/2025102811-CVE-2025-40037-5cfd@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-29T10:57:57.592297+00:00", "updated": "2025-10-29T10:57:57.592323+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}