{"api_version":"1","generated_at":"2026-08-27T14:57:29+00:00","cve":"CVE-2026-80575","urls":{"html":"https://cve.report/CVE-2026-80575","api":"https://cve.report/api/cve/CVE-2026-80575.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80575","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80575"},"summary":{"title":"Input: cs40l50-vibra - validate custom data from user space","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: cs40l50-vibra - validate custom data from user space\n\ncs40l50_add() copies the custom data of an FF_PERIODIC/FF_CUSTOM effect\nstraight from the ff_effect the user passed to EVIOCSFF, without\nrequiring it to hold anything:\n\n    work_data.custom_data = memdup_array_user(periodic->custom_data,\n                                              periodic->custom_len,\n                                              sizeof(s16));\n    work_data.custom_len = periodic->custom_len;\n\nThe driver then reads two words out of that buffer: custom_data[0] as the\nwaveform bank in cs40l50_effect_bank_set(), and custom_data[1] as the\nindex within the bank in cs40l50_effect_index_set().  Neither read is\ncovered by a length check, and custom_len is fully user controlled:\n\n  - custom_len == 0 makes memdup_array_user() call memdup_user() with a\n    length of zero, which returns ZERO_SIZE_PTR rather than an error, so\n    custom_data[0] dereferences it.\n\n  - custom_len == 1 allocates two bytes.  A bank of ROM or RAM keeps\n    effect->type out of the OWT case, and custom_data[1] is then read one\n    word past the allocation.\n\nThe bank value itself is also mishandled.  It is masked with\nCS40L50_CUSTOM_DATA_MASK (0xffff) but stored in an s16, so a\ncustom_data[0] of 0x8000 or above wraps to a negative value that passes\nthe \"bank_type >= CS40L50_WVFRM_BANK_NUM\" test.\ncs40l50_effect_index_set() indexes vib->dsp.banks[] with it before the\nswitch statement's default case gets a chance to reject it:\n\n    base_index = vib->dsp.banks[effect->type].base_index;\n    max_index = vib->dsp.banks[effect->type].max_index;\n\nRequire the two words the driver reads to be present, and hold the masked\nbank in a u32 so the existing upper-bound test covers the whole range.\nThe da7280 haptic driver already range checks custom_len this way.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-26 15:17:13","updated_at":"2026-08-27 06:17:43"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae","name":"https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d","name":"https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006","name":"https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b","name":"https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80575","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80575","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c38fe1bb5d21c2ce0857965ee06174ee587d6b42 3855b6a11f8a7aceb8181cc08c99afef58517006 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c38fe1bb5d21c2ce0857965ee06174ee587d6b42 52a818c586ae2c36b7324bfaefb547f5e866a8ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c38fe1bb5d21c2ce0857965ee06174ee587d6b42 d38554602a0b04e85fad28ce72c7500cf50d419b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c38fe1bb5d21c2ce0857965ee06174ee587d6b42 7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.105 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.46 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.10 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/input/misc/cs40l50-vibra.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3855b6a11f8a7aceb8181cc08c99afef58517006","status":"affected","version":"c38fe1bb5d21c2ce0857965ee06174ee587d6b42","versionType":"git"},{"lessThan":"52a818c586ae2c36b7324bfaefb547f5e866a8ae","status":"affected","version":"c38fe1bb5d21c2ce0857965ee06174ee587d6b42","versionType":"git"},{"lessThan":"d38554602a0b04e85fad28ce72c7500cf50d419b","status":"affected","version":"c38fe1bb5d21c2ce0857965ee06174ee587d6b42","versionType":"git"},{"lessThan":"7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d","status":"affected","version":"c38fe1bb5d21c2ce0857965ee06174ee587d6b42","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/input/misc/cs40l50-vibra.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.105","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.46","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.105","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.46","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.10","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: cs40l50-vibra - validate custom data from user space\n\ncs40l50_add() copies the custom data of an FF_PERIODIC/FF_CUSTOM effect\nstraight from the ff_effect the user passed to EVIOCSFF, without\nrequiring it to hold anything:\n\n    work_data.custom_data = memdup_array_user(periodic->custom_data,\n                                              periodic->custom_len,\n                                              sizeof(s16));\n    work_data.custom_len = periodic->custom_len;\n\nThe driver then reads two words out of that buffer: custom_data[0] as the\nwaveform bank in cs40l50_effect_bank_set(), and custom_data[1] as the\nindex within the bank in cs40l50_effect_index_set().  Neither read is\ncovered by a length check, and custom_len is fully user controlled:\n\n  - custom_len == 0 makes memdup_array_user() call memdup_user() with a\n    length of zero, which returns ZERO_SIZE_PTR rather than an error, so\n    custom_data[0] dereferences it.\n\n  - custom_len == 1 allocates two bytes.  A bank of ROM or RAM keeps\n    effect->type out of the OWT case, and custom_data[1] is then read one\n    word past the allocation.\n\nThe bank value itself is also mishandled.  It is masked with\nCS40L50_CUSTOM_DATA_MASK (0xffff) but stored in an s16, so a\ncustom_data[0] of 0x8000 or above wraps to a negative value that passes\nthe \"bank_type >= CS40L50_WVFRM_BANK_NUM\" test.\ncs40l50_effect_index_set() indexes vib->dsp.banks[] with it before the\nswitch statement's default case gets a chance to reject it:\n\n    base_index = vib->dsp.banks[effect->type].base_index;\n    max_index = vib->dsp.banks[effect->type].max_index;\n\nRequire the two words the driver reads to be present, and hold the masked\nbank in a u32 so the existing upper-bound test covers the whole range.\nThe da7280 haptic driver already range checks custom_len this way."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires a local EVIOCSFF ioctl on the cs40l50_vibra evdev node (/dev/input/event*), traversing evdev_do_ioctl(), input_ff_upload(), and cs40l50_add(); there is no network, adjacent-radio, or physical-insertion path to this driver.\nAC:L - The attacker fully controls ff_effect fields (custom_len, custom_data[0]/[1], waveform type) passed through EVIOCSFF, so custom_len==0, custom_len==1, or bank values >=0x8000 deterministically trigger the missing checks without races or uncontrollable layout.\nPR:L - No capability check exists on the EVIOCSFF path beyond opening the input device; on Android phones, Chromebooks, kiosks, and desktops, logged-in users or session uaccess ACLs commonly grant local access to haptic/input event nodes without init-namespace root.\nUI:N - Once the attacker can open the cs40l50_vibra event device, they issue EVIOCSFF themselves with crafted FF_PERIODIC/FF_CUSTOM parameters; no separate victim mount, plug-in, or interactive action is required.\nS:U - Impact is confined to kernel memory handling and haptic-driver state within the local host kernel; it does not cross VM, container, IOMMU, or other security-scope boundaries.\nC:H - custom_len==1 forces a kmalloc heap out-of-bounds read of custom_data[1], and s16 bank sign-wrap indexes dsp.banks[] out of bounds before validation, leaking adjacent kernel memory; custom_len==0 dereferences ZERO_SIZE_PTR on read.\nI:H - Unchecked custom_len and sign-wrapped bank values cause out-of-bounds kernel memory accesses in the force-feedback upload path; per CNA guidance such heap/array boundary violations in ioctl handlers are scored High because they can corrupt subsequent kernel arithmetic and device register programming.\nA:H - custom_len==0 makes memdup_array_user return ZERO_SIZE_PTR and cs40l50_effect_bank_set dereferences it, and the heap/array out-of-bounds reads can trigger kernel oops/panic or KASAN faults on affected CS40L50 haptic devices."}]}],"providerMetadata":{"dateUpdated":"2026-08-27T05:01:57.416Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006"},{"url":"https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae"},{"url":"https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b"},{"url":"https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"}],"title":"Input: cs40l50-vibra - validate custom data from user space","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80575","datePublished":"2026-08-26T14:37:34.942Z","dateReserved":"2026-08-26T14:34:25.768Z","dateUpdated":"2026-08-27T05:01:57.416Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-26 15:17:13","lastModifiedDate":"2026-08-27 06:17:43","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80575","Ordinal":"1","Title":"Input: cs40l50-vibra - validate custom data from user space","CVE":"CVE-2026-80575","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80575","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: cs40l50-vibra - validate custom data from user space\n\ncs40l50_add() copies the custom data of an FF_PERIODIC/FF_CUSTOM effect\nstraight from the ff_effect the user passed to EVIOCSFF, without\nrequiring it to hold anything:\n\n    work_data.custom_data = memdup_array_user(periodic->custom_data,\n                                              periodic->custom_len,\n                                              sizeof(s16));\n    work_data.custom_len = periodic->custom_len;\n\nThe driver then reads two words out of that buffer: custom_data[0] as the\nwaveform bank in cs40l50_effect_bank_set(), and custom_data[1] as the\nindex within the bank in cs40l50_effect_index_set().  Neither read is\ncovered by a length check, and custom_len is fully user controlled:\n\n  - custom_len == 0 makes memdup_array_user() call memdup_user() with a\n    length of zero, which returns ZERO_SIZE_PTR rather than an error, so\n    custom_data[0] dereferences it.\n\n  - custom_len == 1 allocates two bytes.  A bank of ROM or RAM keeps\n    effect->type out of the OWT case, and custom_data[1] is then read one\n    word past the allocation.\n\nThe bank value itself is also mishandled.  It is masked with\nCS40L50_CUSTOM_DATA_MASK (0xffff) but stored in an s16, so a\ncustom_data[0] of 0x8000 or above wraps to a negative value that passes\nthe \"bank_type >= CS40L50_WVFRM_BANK_NUM\" test.\ncs40l50_effect_index_set() indexes vib->dsp.banks[] with it before the\nswitch statement's default case gets a chance to reject it:\n\n    base_index = vib->dsp.banks[effect->type].base_index;\n    max_index = vib->dsp.banks[effect->type].max_index;\n\nRequire the two words the driver reads to be present, and hold the masked\nbank in a u32 so the existing upper-bound test covers the whole range.\nThe da7280 haptic driver already range checks custom_len this way.","Type":"Description","Title":"Input: cs40l50-vibra - validate custom data from user space"}]}}}