{"api_version":"1","generated_at":"2026-08-04T13:06:52+00:00","cve":"CVE-2026-64504","urls":{"html":"https://cve.report/CVE-2026-64504","api":"https://cve.report/api/cve/CVE-2026-64504.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64504","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64504"},"summary":{"title":"iio: accel: bmc150: clamp the device-reported FIFO frame count","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: bmc150: clamp the device-reported FIFO frame count\n\n__bmc150_accel_fifo_flush() copies the number of samples the device\nreports in its hardware FIFO into an on-stack buffer\n\n\tu16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];\n\nwhich is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The\nframe count is read from the FIFO_STATUS register and only masked to its\n7 valid bits:\n\n\tcount = val & 0x7F;\n\nso it can be 0..127. The only other limit applied to it is the optional\ncaller-supplied sample budget:\n\n\tif (samples && count > samples)\n\t\tcount = samples;\n\nwhich does not constrain count on the flush-all path (samples == 0), and\nleaves it well above 32 whenever samples is larger. count samples are\nthen transferred into buffer[]:\n\n\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\n\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\nto 570 bytes that clobbers the stack canary, saved registers and the\nreturn address.\n\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\nis sized for, before the transfer, mirroring the watermark clamp already\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:36","updated_at":"2026-07-25 10:17:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b","name":"https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175","name":"https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5","name":"https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff","name":"https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721","name":"https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521","name":"https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc","name":"https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb","name":"https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64504","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64504","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 b5a9f521e0a49a0266200fd535b32a9668ecb33b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 2fe0531dd73eff1de0f2584cb77716d645e548d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 89f4a4ca0ac3a933c750569a771c079a290b0721 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 3e766526827acd542bcd36c20c4d5f397e0f6521 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 35a3cd8fd65e15029eb90f1e510045b1bb071175 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bbec9773389112330954a6a64422eaa78d546c1 ce0e1cae26096fe959a0da5563a6d6d5a801d5fb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64504","cve":"CVE-2026-64504","epss":"0.001650000","percentile":"0.061380000","score_date":"2026-07-29","updated_at":"2026-07-30 00:09:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iio/accel/bmc150-accel-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b5a9f521e0a49a0266200fd535b32a9668ecb33b","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"2fe0531dd73eff1de0f2584cb77716d645e548d5","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"89f4a4ca0ac3a933c750569a771c079a290b0721","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"3e766526827acd542bcd36c20c4d5f397e0f6521","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"35a3cd8fd65e15029eb90f1e510045b1bb071175","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"},{"lessThan":"ce0e1cae26096fe959a0da5563a6d6d5a801d5fb","status":"affected","version":"3bbec9773389112330954a6a64422eaa78d546c1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iio/accel/bmc150-accel-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.1"},{"lessThan":"4.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"4.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc3","versionStartIncluding":"4.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: bmc150: clamp the device-reported FIFO frame count\n\n__bmc150_accel_fifo_flush() copies the number of samples the device\nreports in its hardware FIFO into an on-stack buffer\n\n\tu16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];\n\nwhich is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The\nframe count is read from the FIFO_STATUS register and only masked to its\n7 valid bits:\n\n\tcount = val & 0x7F;\n\nso it can be 0..127. The only other limit applied to it is the optional\ncaller-supplied sample budget:\n\n\tif (samples && count > samples)\n\t\tcount = samples;\n\nwhich does not constrain count on the flush-all path (samples == 0), and\nleaves it well above 32 whenever samples is larger. count samples are\nthen transferred into buffer[]:\n\n\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\n\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\nto 570 bytes that clobbers the stack canary, saved registers and the\nreturn address.\n\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\nis sized for, before the transfer, mirroring the watermark clamp already\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:51:58.887Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b"},{"url":"https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5"},{"url":"https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff"},{"url":"https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc"},{"url":"https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721"},{"url":"https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521"},{"url":"https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175"},{"url":"https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb"}],"title":"iio: accel: bmc150: clamp the device-reported FIFO frame count","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64504","datePublished":"2026-07-25T08:51:58.887Z","dateReserved":"2026-07-19T15:36:31.793Z","dateUpdated":"2026-07-25T08:51:58.887Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:36","lastModifiedDate":"2026-07-25 10:17:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64504","Ordinal":"1","Title":"iio: accel: bmc150: clamp the device-reported FIFO frame count","CVE":"CVE-2026-64504","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64504","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: bmc150: clamp the device-reported FIFO frame count\n\n__bmc150_accel_fifo_flush() copies the number of samples the device\nreports in its hardware FIFO into an on-stack buffer\n\n\tu16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];\n\nwhich is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The\nframe count is read from the FIFO_STATUS register and only masked to its\n7 valid bits:\n\n\tcount = val & 0x7F;\n\nso it can be 0..127. The only other limit applied to it is the optional\ncaller-supplied sample budget:\n\n\tif (samples && count > samples)\n\t\tcount = samples;\n\nwhich does not constrain count on the flush-all path (samples == 0), and\nleaves it well above 32 whenever samples is larger. count samples are\nthen transferred into buffer[]:\n\n\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\n\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\nto 570 bytes that clobbers the stack canary, saved registers and the\nreturn address.\n\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\nis sized for, before the transfer, mirroring the watermark clamp already\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.","Type":"Description","Title":"iio: accel: bmc150: clamp the device-reported FIFO frame count"}]}}}