CVE-2024-49920
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check null pointers before multiple uses [WHAT & HOW] Poniters, such as stream_enc and dc->bw_vbios, are null checked previously in the same function, so Coverity warns "implies that stream_enc and dc->bw_vbios might be null". They are used multiple times in the subsequent code and need to be checked. This fixes 10 FORWARD_NULL issues reported by Coverity.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2024-10-21 18:15:14.180000
Last modified
2026-10-30 13:17:39.060000
View original CVE JSON
{
"id": "CVE-2024-49920",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-10-21T18:15:14.180",
"lastModified": "2026-10-30T13:17:39.060",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check null pointers before multiple uses\n\n[WHAT & HOW]\nPoniters, such as stream_enc and dc->bw_vbios, are null checked previously\nin the same function, so Coverity warns \"implies that stream_enc and\ndc->bw_vbios might be null\". They are used multiple times in the\nsubsequent code and need to be checked.\n\nThis fixes 10 FORWARD_NULL issues reported by Coverity."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: comprobar punteros nulos antes de múltiples usos [QUÉ Y CÓMO] Los punteros, como stream_enc y dc->bw_vbios, se comprueban como nulos previamente en la misma función, por lo que Coverity advierte \"implica que stream_enc y dc->bw_vbios podrían ser nulos\". Se utilizan varias veces en el código posterior y es necesario comprobarlos. Esto soluciona 10 problemas de FORWARD_NULL informados por Coverity."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c",
"drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c",
"drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c",
"drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c",
"drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c",
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c",
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource_helpers.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
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"versionType": "git",
"status": "affected"
},
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"versionType": "git",
"status": "affected"
},
{
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"lessThan": "26787fb6c2b2ee0d1a7e1574b36f4711ae40fe27",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "fdd5ecbbff751c3b9061d8ebb08e5c96119915b4",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c",
"drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c",
"drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c",
"drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c",
"drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c",
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c",
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource_helpers.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.15",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.11.3",
"lessThanOrEqual": "6.11.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"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
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2024-10-22T13:40:29.310714Z",
"id": "CVE-2024-49920",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"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:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.11.3",
"matchCriteriaId": "6D5FF9C2-A011-4A64-B614-F9244ED2EA0D"
}
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/26787fb6c2b2ee0d1a7e1574b36f4711ae40fe27",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
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},
{
"url": "https://git.kernel.org/stable/c/4f51f6d23c5856f105110531f81d84e78e462005",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7dc67992b35bc11895149b4261c4ad745312a18d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fdd5ecbbff751c3b9061d8ebb08e5c96119915b4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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}
]
}