264 lines
14 KiB
JSON
264 lines
14 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-2026-80680",
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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": "2026-08-26T14:34:25.783Z",
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"datePublished": "2026-08-28T06:52:48.300Z",
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"dateUpdated": "2026-08-29T06:22:06.613Z"
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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": "2026-08-29T06:22:06.613Z"
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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\ni2c: amd-mp2: Unregister callback on adapter add failure\n\namd_mp2_register_cb() stores the platform I2C context in the MP2 PCI\ndriver's callback table before the adapter is registered. If\ni2c_add_adapter() fails, probe returns and devres frees the context,\nbut the PCI driver can still dereference the stale pointer from its IRQ\nand system-sleep callbacks.\n\nUnregister the callback before returning the adapter registration error."
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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 flaw is in AMD MP2 platform-driver probe teardown and PCI IRQ/system-sleep callbacks, reachable only via local suspend/resume or MP2 hardware interrupts on affected Ryzen laptops; there is no network, Bluetooth, or userspace I2C ioctl path to the stale callback table.\nAC:L - Once i2c_add_adapter() fails the dangling busses[] pointer is deterministic; an attacker can force that registration failure with memory pressure or driver rebind on modular builds, then reliably trigger the UAF through system suspend or MP2 IRQ without uncontrollable races.\nPR:L - After the flawed probe error path leaves the stale callback registered, local users can invoke system suspend via logind/systemctl without init-namespace root, and MP2 IRQs can fire from the already-enabled bus; per CNA guidance Low is used when probe/bind privilege gating is ambiguous.\nUI:N - Exploitation requires no separate victim action; the attacker triggers suspend themselves or relies on automatic MP2 hardware interrupts from an enabled bus, without needing another user to mount filesystems or open files.\nS:U - Impact is host-kernel heap corruption and privilege escalation from stale callback dereference; it does not cross VM, IOMMU, or sandbox security boundaries.\nC:H - The IRQ handler writes into freed amd_i2c_common memory and invokes cmd_completion from the stale object; this UAF provides attacker-influenced heap reuse and arbitrary kernel read primitives per kernel CNA UAF guidance.\nI:H - Suspend/resume and IRQ paths call function pointers through the freed amd_i2c_common structure, enabling control-flow hijack and heap corruption consistent with exploitable UAF write primitives.\nA:H - Stale callback dereference in IRQ or system-sleep paths causes kernel oops/panic and loss of availability; UAF heap corruption can also hang or crash affected AMD MP2 systems on every suspend or interrupt."
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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/i2c/busses/i2c-amd-mp2-plat.c"
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],
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"versions": [
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{
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"version": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "9142a3dcff0d80a3a24ce159aee19ddc869d9784",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "2f7789b3a9628819ebf90bcba8f9da3c139f8687",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "4786d4d70dcd1e6b7e044f2348e00f201947b69c",
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"status": "affected",
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"versionType": "git"
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},
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"lessThan": "b7c2c5c8868737926410b93d1223ada17625ead3",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "cf107c5983dc70fcf932a305581a5f976d908ff1",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "1883a09a37fed497b9efacf736c23624a472246b",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "8bf719659406e4a1b56d441e0c7da2085d891d96",
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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": "529766e0a0114438887382a68d97341fbf8349fb",
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"lessThan": "82048795242f04275a3f49ffc66ad851b6120954",
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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/i2c/busses/i2c-amd-mp2-plat.c"
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],
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"versions": [
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{
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"version": "5.2",
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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": "5.2",
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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": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.151",
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"lessThanOrEqual": "6.6.*",
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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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"operator": "OR",
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.2",
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"versionEndExcluding": "5.10.265"
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"references": [
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"url": "https://git.kernel.org/stable/c/9142a3dcff0d80a3a24ce159aee19ddc869d9784"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f7789b3a9628819ebf90bcba8f9da3c139f8687"
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},
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{
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"url": "https://git.kernel.org/stable/c/4786d4d70dcd1e6b7e044f2348e00f201947b69c"
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},
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{
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"url": "https://git.kernel.org/stable/c/b7c2c5c8868737926410b93d1223ada17625ead3"
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},
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{
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"url": "https://git.kernel.org/stable/c/cf107c5983dc70fcf932a305581a5f976d908ff1"
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},
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{
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"url": "https://git.kernel.org/stable/c/1883a09a37fed497b9efacf736c23624a472246b"
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},
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{
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"url": "https://git.kernel.org/stable/c/8bf719659406e4a1b56d441e0c7da2085d891d96"
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},
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{
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"url": "https://git.kernel.org/stable/c/82048795242f04275a3f49ffc66ad851b6120954"
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}
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],
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"title": "i2c: amd-mp2: Unregister callback on adapter add failure",
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