180 lines
9.6 KiB
JSON
180 lines
9.6 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-2026-80696",
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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": "2026-08-26T14:34:25.785Z",
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"datePublished": "2026-08-28T06:53:01.632Z",
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"dateUpdated": "2026-08-29T06:22:19.564Z"
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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": "2026-08-29T06:22:19.564Z"
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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\nhwmon: (ltc4282) Fix reading the minimum alarm voltage\n\nCoverity reports an out-of-bounds access when reading the minimum alarm\nvoltage for the VGPIO channel. Add the missing return statement to fix\nthe problem."
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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:H/I:H/A:H",
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"baseScore": 7.8,
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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 - The bug is reached only by a local read(2) on /sys/class/hwmon/hwmonN/in2_min_alarm (sysfs -> hwmon_attr_show -> ltc4282_read -> ltc4282_read_in); the LTC4282 I2C hwmon driver has no network, wireless, or direct physical-bus attack surface.\nAC:L - On systems with an LTC4282 bound, any read of in2_min_alarm deterministically executes the missing-return fallthrough and out-of-bounds in0_1_cache[2].en access; the attacker fully controls triggering with no race or conditions outside their control.\nPR:L - in2_min_alarm is exposed as mode 0444 with no capability checks beyond standard sysfs permissions, so any unprivileged local user on a host with LTC4282 hardware can invoke the vulnerable read path without init-namespace root or user-namespace privileges.\nUI:N - Exploitation requires only the attacker (or attacker-controlled monitoring software) to read the hwmon sysfs attribute; no separate victim action such as plugging hardware, mounting filesystems, or approving prompts is needed.\nS:U - The out-of-bounds read and conditional hardware alarm-bit clearing remain within the host kernel/driver context managing the local LTC4282; they do not cross VM, container, IOMMU, or other changed security-authority boundaries.\nC:H - The fallthrough indexes in0_1_cache[2] past the two-element array, performing an out-of-bounds read of adjacent ltc4282_state memory (energy_en/padding) that steers control flow and can return incorrect in2_min_alarm data to userspace.\nI:H - When the out-of-bounds .en byte is non-zero, the fallthrough calls __ltc4282_read_alarm() with VSOURCE_ALARM_L_MASK, clearing the VSOURCE undervoltage alarm bit on the live LTC4282 hot-swap controller and corrupting safety-critical power-rail monitoring on datacenter/telecom racks.\nA:H - Clearing VSOURCE undervoltage alarms on an LTC4282 controlling live backplane/linecard hot-swap power can mask critical rail faults, enabling undetected power events and sustained rack or linecard outages on affected server and industrial deployments."
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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/hwmon/ltc4282.c"
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],
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"versions": [
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{
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"version": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
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"lessThan": "338d655fe09b95a88788c6ac8b1651ca8db9ae51",
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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": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
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"lessThan": "08aee6d45eefc9e0b94c21bd442f47b21d64fa2c",
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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": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
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"lessThan": "a0668ac20feaa3fff9e0c0548556368dbbd2d439",
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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": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
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"lessThan": "00feb1cce93dab948a299b69753d99c681d45a0b",
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"status": "affected",
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"versionType": "git"
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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/hwmon/ltc4282.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.12.103",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.44",
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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": "7.1.8",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.9",
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"versionEndExcluding": "6.12.103"
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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": "6.9",
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.9",
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"versionEndExcluding": "7.1.8"
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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": "6.9",
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"versionEndExcluding": "7.2"
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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/338d655fe09b95a88788c6ac8b1651ca8db9ae51"
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},
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{
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"url": "https://git.kernel.org/stable/c/08aee6d45eefc9e0b94c21bd442f47b21d64fa2c"
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},
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{
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"url": "https://git.kernel.org/stable/c/a0668ac20feaa3fff9e0c0548556368dbbd2d439"
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},
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{
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"url": "https://git.kernel.org/stable/c/00feb1cce93dab948a299b69753d99c681d45a0b"
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}
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],
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"title": "hwmon: (ltc4282) Fix reading the minimum alarm voltage",
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"x_generator": {
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}
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} |