CVE-2026-80575

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80575", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.768Z", "datePublished": "2026-08-26T14:37:34.942Z", "dateUpdated": "2026-08-27T05:01:57.416Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-27T05:01:57.416Z"}, "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": {"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"}, "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/input/misc/cs40l50-vibra.c"], "versions": [{"version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42", "lessThan": "3855b6a11f8a7aceb8181cc08c99afef58517006", "status": "affected", "versionType": "git"}, {"version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42", "lessThan": "52a818c586ae2c36b7324bfaefb547f5e866a8ae", "status": "affected", "versionType": "git"}, {"version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42", "lessThan": "d38554602a0b04e85fad28ce72c7500cf50d419b", "status": "affected", "versionType": "git"}, {"version": "c38fe1bb5d21c2ce0857965ee06174ee587d6b42", "lessThan": "7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d", "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/input/misc/cs40l50-vibra.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.11", "versionEndExcluding": "6.12.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-80575", "lastModified": "2026-08-27T06:17:43.243", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-26T15:17:13.530", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3855b6a11f8a7aceb8181cc08c99afef58517006"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/52a818c586ae2c36b7324bfaefb547f5e866a8ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d38554602a0b04e85fad28ce72c7500cf50d419b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Input: cs40l50-vibra - validate custom data from user space", "id": "2524427", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524427"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nInput: cs40l50-vibra - validate custom data from user space\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:\nwork_data.custom_data = memdup_array_user(periodic->custom_data,\nperiodic->custom_len,\nsizeof(s16));\nwork_data.custom_len = periodic->custom_len;\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- custom_len == 0 makes memdup_array_user() call memdup_user() with a\nlength of zero, which returns ZERO_SIZE_PTR rather than an error, so\ncustom_data[0] dereferences it.\n- custom_len == 1 allocates two bytes. A bank of ROM or RAM keeps\neffect->type out of the OWT case, and custom_data[1] is then read one\nword past the allocation.\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:\nbase_index = vib->dsp.banks[effect->type].base_index;\nmax_index = vib->dsp.banks[effect->type].max_index;\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.", "A flaw was found in the Linux kernel. The `cs40l50-vibra` driver, responsible for haptic feedback, improperly validates the length of custom data provided by a local user. This insufficient validation can lead to out-of-bounds reads and accesses when processing specially crafted input. A local attacker could exploit this to cause a denial of service (system crash) or potentially disclose sensitive information."], "name": "CVE-2026-80575", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80575\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80575\nhttps://lore.kernel.org/linux-cve-announce/2026082613-CVE-2026-80575-644f@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c38fe1bb5d21c2ce0857965ee06174ee587d6b42,3855b6a11f8a7aceb8181cc08c99afef58517006)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c38fe1bb5d21c2ce0857965ee06174ee587d6b42,52a818c586ae2c36b7324bfaefb547f5e866a8ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c38fe1bb5d21c2ce0857965ee06174ee587d6b42,d38554602a0b04e85fad28ce72c7500cf50d419b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c38fe1bb5d21c2ce0857965ee06174ee587d6b42,7d5c576cb1c86047b1fcb1aa9532e17fc5e46c1d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.105,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.46,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.10,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-26T16:00:07.461708+00:00", "updated": "2026-08-28T17:45:04.125789+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}