159 lines
9.2 KiB
JSON
159 lines
9.2 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64501",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T15:36:31.793Z",
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"datePublished": "2026-07-25T08:51:56.768Z",
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"dateUpdated": "2026-08-17T04:56:51.067Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:56:51.067Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad_sigma_delta: fix CS held asserted and state leaks\n\nIn ad_sigma_delta_single_conversion(), set_mode(AD_SD_MODE_IDLE) and\ndisable_one() were called from the out: block while keep_cs_asserted\nwas still true. This caused any SPI transfer issued by those callbacks\nto carry cs_change=1, leaving CS permanently asserted after the\nconversion. Fix by moving both calls into the out_unlock: block, after\nkeep_cs_asserted is cleared, matching the pattern already used in\nad_sd_calibrate().\n\nIn the error path of ad_sd_buffer_postenable(), if an operation fails\nafter set_mode(AD_SD_MODE_CONTINUOUS) has already succeeded (e.g.\nspi_offload_trigger_enable()), the device is left in continuous\nconversion mode with CS physically asserted. Additionally,\nbus_locked remaining true after spi_bus_unlock() causes subsequent\nSPI operations to call spi_sync_locked() without the bus lock actually\nheld, allowing concurrent SPI access.\n\nFix the error path by clearing keep_cs_asserted first, then calling\nset_mode(AD_SD_MODE_IDLE) to revert the device mode and deassert CS,\nthen clearing bus_locked before releasing the bus.\n\nFor devices that implement neither set_mode nor disable_one (such as\nMAX11205, which has no physical CS pin), no SPI transfer is issued\nduring cleanup and the cs_change flag has no effect on any physical\nline."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
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"baseScore": 7.1,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - An attacker reaches the vulnerable conversion path through local reads of IIO `*_raw` sysfs attributes; physical access to the installed ADC is unnecessary.\nAC:L - The normal single-conversion cleanup deterministically leaves CS asserted, and the attacker can repeat the trigger or interrupt their own conversion wait without winning a race.\nPR:L - IIO raw attributes are world-readable and the path contains no capability or authentication check, so an ordinary unprivileged local user can trigger it.\nUI:N - The attacker directly reads the sysfs attribute or initiates permitted device access; no victim action is required.\nS:U - The affected ADC, SPI controller, shared-bus devices, and kernel operate under the same system security authority; this is not a sandbox or virtualization boundary escape.\nC:N - The state corruption creates no kernel-memory disclosure or unauthorized read primitive; the separate heap-overflow issue in CVE-2026-64502 is not part of this CVE.\nI:H - With CS stuck active, attacker-influenced traffic for another shared-bus device can be consumed as commands by register-based ADCs, including writes to mode, channel, offset, and gain registers that can completely corrupt measurement integrity.\nA:H - The persistently selected ADC can contend on MISO, consume sibling-device traffic, and leave the ADC or shared SPI bus unusable until reset or corrective access; an unprivileged attacker can repeatedly restore this condition."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iio/adc/ad_sigma_delta.c"
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],
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"versions": [
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{
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"version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
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"lessThan": "c313bb7c38855e94ceef939d152dd75e5a904b5f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
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"lessThan": "f1de829ee87a1198d3465493ce430d36c5fa029c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "132d44dc6966c1cf841ffe0f6f048165687e870b",
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"lessThan": "c72da0688575e5ef39c36bb44fed53aa18f8ae65",
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iio/adc/ad_sigma_delta.c"
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],
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"versions": [
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{
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"version": "6.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.39",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.14",
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"versionEndExcluding": "6.18.39"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.14",
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"versionEndExcluding": "7.1.4"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.14",
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c313bb7c38855e94ceef939d152dd75e5a904b5f"
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},
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{
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"url": "https://git.kernel.org/stable/c/f1de829ee87a1198d3465493ce430d36c5fa029c"
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},
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{
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"url": "https://git.kernel.org/stable/c/c72da0688575e5ef39c36bb44fed53aa18f8ae65"
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}
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],
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"title": "iio: adc: ad_sigma_delta: fix CS held asserted and state leaks",
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"x_generator": {
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