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CVE-2024-47748 (GCVE-0-2024-47748)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:14 – Updated: 2026-08-05 11:39
VLAI
Title
vhost_vdpa: assign irq bypass producer token correctly
Summary
In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-21 12:58 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 927a2580208e0f9b0b47b08f1c802b7233a7ba3c (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < ec5f1b54ceb23475049ada6e7a43452cf4df88d1 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < ca64edd7ae93402af2596a952e0d94d545e2b9c0 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < fae9b1776f53aab93ab345bdbf653b991aed717d (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 7cf2fb51175cafe01df8c43fa15a06194a59c6e2 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 02e9e9366fefe461719da5d173385b6685f70319 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "cve": "CVE-2024-47748",
      "id": "msrc_CVE-2024-47748",
      "initial_release_date": "2024-10-01T07:00:00.000Z",
      "product_status:fixed": "5",
      "product_status:known_affected": "5",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "vhost_vdpa: assign irq bypass producer token correctly",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-47748.json",
      "version": "3"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-47748\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T13:15:04.857\",\"lastModified\":\"2026-08-04T11:20:48.207\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvhost_vdpa: assign irq bypass producer token correctly\\n\\nWe used to call irq_bypass_unregister_producer() in\\nvhost_vdpa_setup_vq_irq() which is problematic as we don\u0027t know if the\\ntoken pointer is still valid or not.\\n\\nActually, we use the eventfd_ctx as the token so the life cycle of the\\ntoken should be bound to the VHOST_SET_VRING_CALL instead of\\nvhost_vdpa_setup_vq_irq() which could be called by set_status().\\n\\nFixing this by setting up irq bypass producer\u0027s token when handling\\nVHOST_SET_VRING_CALL and un-registering the producer before calling\\nvhost_vring_ioctl() to prevent a possible use after free as eventfd\\ncould have been released in vhost_vring_ioctl(). And such registering\\nand unregistering will only be done if DRIVER_OK is set.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vhost_vdpa: asignar correctamente el token del productor de omisi\u00f3n de irq Sol\u00edamos llamar a irq_bypass_unregister_producer() en vhost_vdpa_setup_vq_irq(), lo cual es problem\u00e1tico ya que no sabemos si el puntero del token sigue siendo v\u00e1lido o no. En realidad, usamos eventfd_ctx como token, por lo que el ciclo de vida del token deber\u00eda estar vinculado a VHOST_SET_VRING_CALL en lugar de a vhost_vdpa_setup_vq_irq(), que podr\u00eda llamarse mediante set_status(). Para solucionar esto, configuramos el token del productor de omisi\u00f3n de irq al manejar VHOST_SET_VRING_CALL y anulamos el registro del productor antes de llamar a vhost_vring_ioctl() para evitar un posible use after free, ya que eventfd podr\u00eda haberse liberado en vhost_vring_ioctl(). Y dicho registro y anulaci\u00f3n de registro solo se realizar\u00e1 si DRIVER_OK est\u00e1 configurado.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/vhost/vdpa.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"927a2580208e0f9b0b47b08f1c802b7233a7ba3c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"ec5f1b54ceb23475049ada6e7a43452cf4df88d1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"ca64edd7ae93402af2596a952e0d94d545e2b9c0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"fae9b1776f53aab93ab345bdbf653b991aed717d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"7cf2fb51175cafe01df8c43fa15a06194a59c6e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60\",\"lessThan\":\"02e9e9366fefe461719da5d173385b6685f70319\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/vhost/vdpa.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.227\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.168\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.113\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.54\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.13\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11.2\",\"lessThanOrEqual\":\"6.11.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-10-21T12:58:17.248658Z\",\"id\":\"CVE-2024-47748\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T17:52:34+00:00",
      "cve": "CVE-2024-47748",
      "id": "CVE-2024-47748",
      "initial_release_date": "2024-10-21T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vhost_vdpa: assign irq bypass producer token correctly",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-47748.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-31T00:30:46Z",
      "cve": "CVE-2024-47748",
      "id": "CVE-2024-47748",
      "initial_release_date": "2024-10-21T15:46:17Z",
      "product_status:known_affected": "324",
      "product_status:known_not_affected": "313",
      "product_status:recommended": "804",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-47748",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-47748.json",
      "version": "95"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:21:42.762Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-47748\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T12:58:17.248658Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T12:58:20.429Z\"}}], \"cna\": {\"title\": \"vhost_vdpa: assign irq bypass producer token correctly\", \"affected\": 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\"https://git.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0\"}, {\"url\": \"https://git.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717d\"}, {\"url\": \"https://git.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2\"}, {\"url\": \"https://git.kernel.org/stable/c/02e9e9366fefe461719da5d173385b6685f70319\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvhost_vdpa: assign irq bypass producer token correctly\\n\\nWe used to call irq_bypass_unregister_producer() in\\nvhost_vdpa_setup_vq_irq() which is problematic as we don\u0027t know if the\\ntoken pointer is still valid or not.\\n\\nActually, we use the eventfd_ctx as the token so the life cycle of the\\ntoken should be bound to the VHOST_SET_VRING_CALL instead of\\nvhost_vdpa_setup_vq_irq() which could be called by set_status().\\n\\nFixing this by setting up irq bypass producer\u0027s token when handling\\nVHOST_SET_VRING_CALL and un-registering the producer before calling\\nvhost_vring_ioctl() to prevent a possible use after free as eventfd\\ncould have been released in vhost_vring_ioctl(). And such registering\\nand unregistering will only be done if DRIVER_OK is set.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.227\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.54\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.13\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.2\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"5.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:39:01.429Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47748\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:21:42.762Z\", \"dateReserved\": \"2024-09-30T16:00:12.960Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T12:14:14.448Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.