CVE-2026-80680 (GCVE-0-2026-80680)
Vulnerability from cvelistv5
Published
2026-08-28 06:52
Modified
2026-08-29 06:22
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
i2c: amd-mp2: Unregister callback on adapter add failure
amd_mp2_register_cb() stores the platform I2C context in the MP2 PCI
driver's callback table before the adapter is registered. If
i2c_add_adapter() fails, probe returns and devres frees the context,
but the PCI driver can still dereference the stale pointer from its IRQ
and system-sleep callbacks.
Unregister the callback before returning the adapter registration error.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb Version: 529766e0a0114438887382a68d97341fbf8349fb |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/i2c/busses/i2c-amd-mp2-plat.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "529766e0a0114438887382a68d97341fbf8349fb",
"versionType": "git"
},
{
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"status": "affected",
"version": "529766e0a0114438887382a68d97341fbf8349fb",
"versionType": "git"
},
{
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"status": "affected",
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},
{
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/i2c/busses/i2c-amd-mp2-plat.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"lessThan": "5.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.151",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.103",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.44",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.8",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"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\u0027s 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."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-29T06:22:06.613Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/9142a3dcff0d80a3a24ce159aee19ddc869d9784"
},
{
"url": "https://git.kernel.org/stable/c/2f7789b3a9628819ebf90bcba8f9da3c139f8687"
},
{
"url": "https://git.kernel.org/stable/c/4786d4d70dcd1e6b7e044f2348e00f201947b69c"
},
{
"url": "https://git.kernel.org/stable/c/b7c2c5c8868737926410b93d1223ada17625ead3"
},
{
"url": "https://git.kernel.org/stable/c/cf107c5983dc70fcf932a305581a5f976d908ff1"
},
{
"url": "https://git.kernel.org/stable/c/1883a09a37fed497b9efacf736c23624a472246b"
},
{
"url": "https://git.kernel.org/stable/c/8bf719659406e4a1b56d441e0c7da2085d891d96"
},
{
"url": "https://git.kernel.org/stable/c/82048795242f04275a3f49ffc66ad851b6120954"
}
],
"title": "i2c: amd-mp2: Unregister callback on adapter add failure",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80680",
"datePublished": "2026-08-28T06:52:48.300Z",
"dateReserved": "2026-08-26T14:34:25.783Z",
"dateUpdated": "2026-08-29T06:22:06.613Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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