CVE-2026-98465
In the Linux kernel, the following vulnerability has been resolved:
RISC-V: KVM: Serialize IMSIC attributes with vCPU migration
KVM device ioctls are not serialized against KVM_RUN. As a result, kvm_riscv_aia_imsic_rw_attr() can snapshot the physical CPU and HGEI of an IMSIC VS-file before a concurrent vCPU migration releases it.
The HGEI can then be allocated to another vCPU before imsic_vsfile_rw() uses the stale tuple. A GET or SET attribute may consequently access the new owner's interrupt file.
Serialize the entire IMSIC attribute operation with the target vCPU mutex. This prevents the VS-file from being migrated and recycled until the attribute access completes.
Read full descriptionShow less
Acquire the mutex killably so that the device ioctl remains interruptible while waiting for KVM_RUN to finish.
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.20 %
- Percentile among all scored CVEs
- 9
- Score date
- 10/21/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Show 5 references
- https://git.kernel.org/stable/c/6c2bcf6b173d4afed883cceea9d47f2c5194161d
- https://git.kernel.org/stable/c/71acbea44e78665ea90e3c310fca6bbdcc0252db
- https://git.kernel.org/stable/c/8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc
- https://git.kernel.org/stable/c/a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98
- https://git.kernel.org/stable/c/c525772c304c971b0d3a1f2898dedbae653efe90
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98465",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "db8b7e97d6137a28b2bfc07e591d54da268f0c36",
"lessThan": "6c2bcf6b173d4afed883cceea9d47f2c5194161d",
"versionType": "git"
},
{
"status": "affected",
"version": "db8b7e97d6137a28b2bfc07e591d54da268f0c36",
"lessThan": "a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98",
"versionType": "git"
},
{
"status": "affected",
"version": "db8b7e97d6137a28b2bfc07e591d54da268f0c36",
"lessThan": "c525772c304c971b0d3a1f2898dedbae653efe90",
"versionType": "git"
},
{
"status": "affected",
"version": "db8b7e97d6137a28b2bfc07e591d54da268f0c36",
"lessThan": "71acbea44e78665ea90e3c310fca6bbdcc0252db",
"versionType": "git"
},
{
"status": "affected",
"version": "db8b7e97d6137a28b2bfc07e591d54da268f0c36",
"lessThan": "8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc",
"versionType": "git"
}
],
"programFiles": [
"arch/riscv/kvm/aia_imsic.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/riscv/kvm/aia_imsic.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:16:56.993",
"references": [
{
"url": "https://git.kernel.org/stable/c/6c2bcf6b173d4afed883cceea9d47f2c5194161d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/71acbea44e78665ea90e3c310fca6bbdcc0252db",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8ae12ccaec6ec74945d8c1ef39f2c1b8df779abc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a29c5d2dd2ef9a8617a9a6d5585696d5f149cd98",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c525772c304c971b0d3a1f2898dedbae653efe90",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRISC-V: KVM: Serialize IMSIC attributes with vCPU migration\n\nKVM device ioctls are not serialized against KVM_RUN. As a result,\nkvm_riscv_aia_imsic_rw_attr() can snapshot the physical CPU and HGEI of\nan IMSIC VS-file before a concurrent vCPU migration releases it.\n\nThe HGEI can then be allocated to another vCPU before imsic_vsfile_rw()\nuses the stale tuple. A GET or SET attribute may consequently access the\nnew owner's interrupt file.\n\nSerialize the entire IMSIC attribute operation with the target vCPU\nmutex. This prevents the VS-file from being migrated and recycled until\nthe attribute access completes. Acquire the mutex killably so that the\ndevice ioctl remains interruptible while waiting for KVM_RUN to finish."
}
],
"lastModified": "2026-10-21T13:21:31.003",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}