cve-2024-46698
Vulnerability from cvelistv5
Published
2024-09-13 05:29
Modified
2024-12-19 09:21
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
video/aperture: optionally match the device in sysfb_disable()
In aperture_remove_conflicting_pci_devices(), we currently only
call sysfb_disable() on vga class devices. This leads to the
following problem when the pimary device is not VGA compatible:
1. A PCI device with a non-VGA class is the boot display
2. That device is probed first and it is not a VGA device so
sysfb_disable() is not called, but the device resources
are freed by aperture_detach_platform_device()
3. Non-primary GPU has a VGA class and it ends up calling sysfb_disable()
4. NULL pointer dereference via sysfb_disable() since the resources
have already been freed by aperture_detach_platform_device() when
it was called by the other device.
Fix this by passing a device pointer to sysfb_disable() and checking
the device to determine if we should execute it or not.
v2: Fix build when CONFIG_SCREEN_INFO is not set
v3: Move device check into the mutex
Drop primary variable in aperture_remove_conflicting_pci_devices()
Drop __init on pci sysfb_pci_dev_is_enabled()
References
Impacted products
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"id": "CVE-2024-46698",
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"programFiles": [
"drivers/firmware/sysfb.c",
"drivers/of/platform.c",
"drivers/video/aperture.c",
"include/linux/sysfb.h"
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo/aperture: optionally match the device in sysfb_disable()\n\nIn aperture_remove_conflicting_pci_devices(), we currently only\ncall sysfb_disable() on vga class devices. This leads to the\nfollowing problem when the pimary device is not VGA compatible:\n\n1. A PCI device with a non-VGA class is the boot display\n2. That device is probed first and it is not a VGA device so\n sysfb_disable() is not called, but the device resources\n are freed by aperture_detach_platform_device()\n3. Non-primary GPU has a VGA class and it ends up calling sysfb_disable()\n4. NULL pointer dereference via sysfb_disable() since the resources\n have already been freed by aperture_detach_platform_device() when\n it was called by the other device.\n\nFix this by passing a device pointer to sysfb_disable() and checking\nthe device to determine if we should execute it or not.\n\nv2: Fix build when CONFIG_SCREEN_INFO is not set\nv3: Move device check into the mutex\n Drop primary variable in aperture_remove_conflicting_pci_devices()\n Drop __init on pci sysfb_pci_dev_is_enabled()"
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/b49420d6a1aeb399e5b107fc6eb8584d0860fbd7"
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"title": "video/aperture: optionally match the device in sysfb_disable()",
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"assignerShortName": "Linux",
"cveId": "CVE-2024-46698",
"datePublished": "2024-09-13T05:29:25.387Z",
"dateReserved": "2024-09-11T15:12:18.250Z",
"dateUpdated": "2024-12-19T09:21:13.035Z",
"state": "PUBLISHED"
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-46698\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-13T06:15:14.563\",\"lastModified\":\"2024-09-13T16:53:03.000\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvideo/aperture: optionally match the device in sysfb_disable()\\n\\nIn aperture_remove_conflicting_pci_devices(), we currently only\\ncall sysfb_disable() on vga class devices. This leads to the\\nfollowing problem when the pimary device is not VGA compatible:\\n\\n1. A PCI device with a non-VGA class is the boot display\\n2. That device is probed first and it is not a VGA device so\\n sysfb_disable() is not called, but the device resources\\n are freed by aperture_detach_platform_device()\\n3. Non-primary GPU has a VGA class and it ends up calling sysfb_disable()\\n4. NULL pointer dereference via sysfb_disable() since the resources\\n have already been freed by aperture_detach_platform_device() when\\n it was called by the other device.\\n\\nFix this by passing a device pointer to sysfb_disable() and checking\\nthe device to determine if we should execute it or not.\\n\\nv2: Fix build when CONFIG_SCREEN_INFO is not set\\nv3: Move device check into the mutex\\n Drop primary variable in aperture_remove_conflicting_pci_devices()\\n Drop __init on pci sysfb_pci_dev_is_enabled()\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video/aperture: opcionalmente hacer coincidir el dispositivo en sysfb_disable() En aperture_remove_conflicting_pci_devices(), actualmente solo llamamos a sysfb_disable() en dispositivos de clase vga. Esto lleva al siguiente problema cuando el dispositivo principal no es compatible con VGA: 1. Un dispositivo PCI con una clase que no es VGA es la pantalla de arranque 2. Ese dispositivo se sondea primero y no es un dispositivo VGA, por lo que no se llama a sysfb_disable(), pero los recursos del dispositivo se liberan mediante aperture_detach_platform_device() 3. La GPU no principal tiene una clase VGA y termina llamando a sysfb_disable() 4. Desreferencia de puntero NULL a trav\u00e9s de sysfb_disable() ya que los recursos ya se han liberado mediante aperture_detach_platform_device() cuando fue llamado por el otro dispositivo. Solucione esto pasando un puntero de dispositivo a sysfb_disable() y verificando el dispositivo para determinar si debemos ejecutarlo o no. v2: Arreglar la compilaci\u00f3n cuando CONFIG_SCREEN_INFO no est\u00e1 configurado v3: Mover la verificaci\u00f3n del dispositivo al mutex Eliminar la variable principal en aperture_remove_conflicting_pci_devices() Eliminar __init en pci sysfb_pci_dev_is_enabled()\"}],\"metrics\":{\"cvssMetricV31\":[{\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5\",\"versionEndExcluding\":\"6.10.8\",\"matchCriteriaId\":\"44B0C10F-3694-48FB-9556-944BD815090B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/17e78f43de0c6da34204cc858b4cc05671ea9acf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b49420d6a1aeb399e5b107fc6eb8584d0860fbd7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}
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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.
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- 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.