CVE-2025-40160 (GCVE-0-2025-40160)
Vulnerability from cvelistv5 – Published: 2025-11-12 10:24 – Updated: 2026-10-30 12:22
VLAI
EPSS
VEX
Title
xen/events: Return -EEXIST for bound VIRQs
Summary
In the Linux kernel, the following vulnerability has been resolved:
xen/events: Return -EEXIST for bound VIRQs
Change find_virq() to return -EEXIST when a VIRQ is bound to a
different CPU than the one passed in. With that, remove the BUG_ON()
from bind_virq_to_irq() to propogate the error upwards.
Some VIRQs are per-cpu, but others are per-domain or global. Those must
be bound to CPU0 and can then migrate elsewhere. The lookup for
per-domain and global will probably fail when migrated off CPU 0,
especially when the current CPU is tracked. This now returns -EEXIST
instead of BUG_ON().
A second call to bind a per-domain or global VIRQ is not expected, but
make it non-fatal to avoid trying to look up the irq, since we don't
know which per_cpu(virq_to_irq) it will be in.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
62cc5fc7b2e0218144e162afb8191db9b924b5e6 , < 7e19b3643855d4b63442bd20e8bb811e1a75998e
(git)
Affected: 62cc5fc7b2e0218144e162afb8191db9b924b5e6 , < 612ef6056855c0aacb9b25d1d853c435754483f7 (git) Affected: 62cc5fc7b2e0218144e162afb8191db9b924b5e6 , < a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa (git) Affected: 62cc5fc7b2e0218144e162afb8191db9b924b5e6 , < f81db055a793eca9d05f79658ff62adafb41d664 (git) Affected: 62cc5fc7b2e0218144e162afb8191db9b924b5e6 , < 07ce121d93a5e5fb2440a24da3dbf408fcee978e (git) |
guessed | |
| Linux | Linux |
Affected:
3.2
Unaffected: 0 , < 3.2 (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.113 , ≤ 6.6.* (semver) Unaffected: 6.12.54 , ≤ 6.12.* (semver) Unaffected: 6.17.4 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/xen/events/events_base.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "7e19b3643855d4b63442bd20e8bb811e1a75998e",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "612ef6056855c0aacb9b25d1d853c435754483f7",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "f81db055a793eca9d05f79658ff62adafb41d664",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "07ce121d93a5e5fb2440a24da3dbf408fcee978e",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/xen/events/events_base.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"lessThan": "3.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.191",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.191",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.113",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.54",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.4",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"versionStartIncluding": "3.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/events: Return -EEXIST for bound VIRQs\n\nChange find_virq() to return -EEXIST when a VIRQ is bound to a\ndifferent CPU than the one passed in. With that, remove the BUG_ON()\nfrom bind_virq_to_irq() to propogate the error upwards.\n\nSome VIRQs are per-cpu, but others are per-domain or global. Those must\nbe bound to CPU0 and can then migrate elsewhere. The lookup for\nper-domain and global will probably fail when migrated off CPU 0,\nespecially when the current CPU is tracked. This now returns -EEXIST\ninstead of BUG_ON().\n\nA second call to bind a per-domain or global VIRQ is not expected, but\nmake it non-fatal to avoid trying to look up the irq, since we don\u0027t\nknow which per_cpu(virq_to_irq) it will be in."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T12:22:54.628Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7e19b3643855d4b63442bd20e8bb811e1a75998e"
},
{
"url": "https://git.kernel.org/stable/c/612ef6056855c0aacb9b25d1d853c435754483f7"
},
{
"url": "https://git.kernel.org/stable/c/a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa"
},
{
"url": "https://git.kernel.org/stable/c/f81db055a793eca9d05f79658ff62adafb41d664"
},
{
"url": "https://git.kernel.org/stable/c/07ce121d93a5e5fb2440a24da3dbf408fcee978e"
}
],
"title": "xen/events: Return -EEXIST for bound VIRQs",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-40160",
"datePublished": "2025-11-12T10:24:36.429Z",
"dateReserved": "2025-04-16T07:20:57.176Z",
"dateUpdated": "2026-10-30T12:22:54.628Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-40160",
"date": "2026-11-02",
"epss": "0.00201",
"percentile": "0.0997"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/xen/events/events_base.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "7e19b3643855d4b63442bd20e8bb811e1a75998e",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "612ef6056855c0aacb9b25d1d853c435754483f7",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "f81db055a793eca9d05f79658ff62adafb41d664",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
},
{
"lessThan": "07ce121d93a5e5fb2440a24da3dbf408fcee978e",
"status": "affected",
"version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/xen/events/events_base.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"lessThan": "3.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.191",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/events: Return -EEXIST for bound VIRQs\n\nChange find_virq() to return -EEXIST when a VIRQ is bound to a\ndifferent CPU than the one passed in. With that, remove the BUG_ON()\nfrom bind_virq_to_irq() to propogate the error upwards.\n\nSome VIRQs are per-cpu, but others are per-domain or global. Those must\nbe bound to CPU0 and can then migrate elsewhere. The lookup for\nper-domain and global will probably fail when migrated off CPU 0,\nespecially when the current CPU is tracked. This now returns -EEXIST\ninstead of BUG_ON().\n\nA second call to bind a per-domain or global VIRQ is not expected, but\nmake it non-fatal to avoid trying to look up the irq, since we don\u0027t\nknow which per_cpu(virq_to_irq) it will be in."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxen/events: Devolver -EEXIST para VIRQs enlazados\n\nCambiar find_virq() para que devuelva -EEXIST cuando un VIRQ est\u00e1 enlazado a una CPU diferente a la pasada como argumento. Con esto, eliminar el BUG_ON() de bind_virq_to_irq() para propagar el error hacia arriba.\n\nAlgunos VIRQs son por-CPU, pero otros son por-dominio o globales. Esos deben ser enlazados a la CPU0 y luego pueden migrar a otro lugar. La b\u00fasqueda para los por-dominio y globales probablemente fallar\u00e1 cuando se migren fuera de la CPU 0, especialmente cuando se rastrea la CPU actual. Esto ahora devuelve -EEXIST en lugar de BUG_ON().\n\nNo se espera una segunda llamada para enlazar un VIRQ por-dominio o global, pero hacerla no-fatal para evitar intentar buscar la irq, ya que no sabemos en qu\u00e9 per_cpu(virq_to_irq) estar\u00e1."
}
],
"id": "CVE-2025-40160",
"lastModified": "2026-10-30T13:18:14.127",
"metrics": {},
"published": "2025-11-12T11:15:46.123",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/07ce121d93a5e5fb2440a24da3dbf408fcee978e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/612ef6056855c0aacb9b25d1d853c435754483f7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7e19b3643855d4b63442bd20e8bb811e1a75998e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f81db055a793eca9d05f79658ff62adafb41d664"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T02:55:53+00:00",
"cve": "CVE-2025-40160",
"id": "CVE-2025-40160",
"initial_release_date": "2025-11-12T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: xen/events: Return -EEXIST for bound VIRQs",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40160.json",
"version": "3"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.