CVE-2026-46245

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Only poll analog connectors.\n 926 */\n 927 use_polling |=\n 928 amdgpu_dm_connector->dc_link &&\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The patch adds this NULL check but hopefully it can be removed\n\n 929 dc_connector_supports_analog(amdgpu_dm_connector->dc_link->link_id.id);\n 930\n 931 dc_link = amdgpu_dm_connector->dc_link;\n\ndc_link assigned here.\n\n 932\n 933 /*\n 934 * Get a base driver irq reference for hpd ints for the lifetime\n 935 * of dm. Note that only hpd interrupt types are registered with\n 936 * base driver; hpd_rx types aren't. IOW, amdgpu_irq_get/put on\n 937 * hpd_rx isn't available. DM currently controls hpd_rx\n 938 * explicitly with dc_interrupt_set()\n 939 */\n--> 940 if (dc_link->irq_source_hpd != DC_IRQ_SOURCE_INVALID) {\n ^^^^^^^^^^^^^^^^^^^^^^^ If it's NULL then we are trouble because we dereference it here.\n\n 941 irq_type = dc_link->irq_source_hpd - DC_IRQ_SOURCE_HPD1;\n 942 /*\n 943 * TODO: There's a mismatch between mode_info.num_hpd\n 944 * and what bios reports as the # of connectors with hpd"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c"], "versions": [{"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "d772e8570f19ac05fd9b11c8af86ada98f35f0c8", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "0965f1e775130e325e74152d867d2e8ce865fa05", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "1d15503e454bf117a0d0078332d48df86a41c828", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "a490e4d3c9fed1e690c8de348416eea3a9f054ff", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "226a40c06a183abaeb7529a4f54d6c203bd14407", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d772e8570f19ac05fd9b11c8af86ada98f35f0c8"}, {"url": "https://git.kernel.org/stable/c/0965f1e775130e325e74152d867d2e8ce865fa05"}, {"url": "https://git.kernel.org/stable/c/1d15503e454bf117a0d0078332d48df86a41c828"}, {"url": "https://git.kernel.org/stable/c/a490e4d3c9fed1e690c8de348416eea3a9f054ff"}, {"url": "https://git.kernel.org/stable/c/226a40c06a183abaeb7529a4f54d6c203bd14407"}], "title": "drm/amd/display: Fix dc_link NULL handling in HPD init", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46245", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:12:46.754116Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:13:46.132Z"}}]}}

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Only poll analog connectors.\n 926 */\n 927 use_polling |=\n 928 amdgpu_dm_connector->dc_link &&\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The patch adds this NULL check but hopefully it can be removed\n\n 929 dc_connector_supports_analog(amdgpu_dm_connector->dc_link->link_id.id);\n 930\n 931 dc_link = amdgpu_dm_connector->dc_link;\n\ndc_link assigned here.\n\n 932\n 933 /*\n 934 * Get a base driver irq reference for hpd ints for the lifetime\n 935 * of dm. Note that only hpd interrupt types are registered with\n 936 * base driver; hpd_rx types aren't. IOW, amdgpu_irq_get/put on\n 937 * hpd_rx isn't available. DM currently controls hpd_rx\n 938 * explicitly with dc_interrupt_set()\n 939 */\n--> 940 if (dc_link->irq_source_hpd != DC_IRQ_SOURCE_INVALID) {\n ^^^^^^^^^^^^^^^^^^^^^^^ If it's NULL then we are trouble because we dereference it here.\n\n 941 irq_type = dc_link->irq_source_hpd - DC_IRQ_SOURCE_HPD1;\n 942 /*\n 943 * TODO: There's a mismatch between mode_info.num_hpd\n 944 * and what bios reports as the # of connectors with hpd"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.114", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.57", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.4", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "4.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:41:29.783Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46245", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:13:46.132Z", "dateReserved": "2026-05-13T15:03:33.107Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-06-03T15:49:40.645Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d772e8570f19ac05fd9b11c8af86ada98f35f0c8", "status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "versionType": "git"}, {"lessThan": "0965f1e775130e325e74152d867d2e8ce865fa05", "status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "versionType": "git"}, {"lessThan": "1d15503e454bf117a0d0078332d48df86a41c828", "status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "versionType": "git"}, {"lessThan": "a490e4d3c9fed1e690c8de348416eea3a9f054ff", "status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "versionType": "git"}, {"lessThan": "226a40c06a183abaeb7529a4f54d6c203bd14407", "status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92951753-508C-4AD2-8C9B-2C63E988AEA0", "versionEndExcluding": "6.19.4", "versionStartIncluding": "4.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix dc_link NULL handling in HPD init\n\namdgpu_dm_hpd_init() may see connectors without a valid dc_link.\n\nThe code already checks dc_link for the polling decision, but later\nunconditionally dereferences it when setting up HPD interrupts.\n\nAssign dc_link early and skip connectors where it is NULL.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c:940 amdgpu_dm_hpd_init()\nerror: we previously assumed 'dc_link' could be null (see line 931)\n\ndrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c\n 923 /*\n 924 * Analog connectors may be hot-plugged unlike other connector\n 925 * types that don't support HPD. Only poll analog connectors.\n 926 */\n 927 use_polling |=\n 928 amdgpu_dm_connector->dc_link &&\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The patch adds this NULL check but hopefully it can be removed\n\n 929 dc_connector_supports_analog(amdgpu_dm_connector->dc_link->link_id.id);\n 930\n 931 dc_link = amdgpu_dm_connector->dc_link;\n\ndc_link assigned here.\n\n 932\n 933 /*\n 934 * Get a base driver irq reference for hpd ints for the lifetime\n 935 * of dm. Note that only hpd interrupt types are registered with\n 936 * base driver; hpd_rx types aren't. IOW, amdgpu_irq_get/put on\n 937 * hpd_rx isn't available. DM currently controls hpd_rx\n 938 * explicitly with dc_interrupt_set()\n 939 */\n--> 940 if (dc_link->irq_source_hpd != DC_IRQ_SOURCE_INVALID) {\n ^^^^^^^^^^^^^^^^^^^^^^^ If it's NULL then we are trouble because we dereference it here.\n\n 941 irq_type = dc_link->irq_source_hpd - DC_IRQ_SOURCE_HPD1;\n 942 /*\n 943 * TODO: There's a mismatch between mode_info.num_hpd\n 944 * and what bios reports as the # of connectors with hpd"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amd/display: Correcci\u00f3n del manejo de dc_link NULL en la inicializaci\u00f3n de HPD\n\namdgpu_dm_hpd_init() puede encontrar conectores sin un dc_link v\u00e1lido.\n\nEl c\u00f3digo ya verifica dc_link para la decisi\u00f3n de sondeo, pero luego lo desreferencia incondicionalmente al configurar las interrupciones HPD.\n\nAsigne dc_link con antelaci\u00f3n y omita los conectores donde sea NULL.\n\nSoluciona lo siguiente:\ndrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c:940 amdgpu_dm_hpd_init()\nerror: previamente asumimos que 'dc_link' podr\u00eda ser nulo (ver l\u00ednea 931)\n\ndrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c\n 923 /*\n 924 * Los conectores anal\u00f3gicos pueden ser conectados en caliente a diferencia de otros tipos de conectores\n 925 * que no soportan HPD. Solo sondee los conectores anal\u00f3gicos.\n 926 */\n 927 use_polling |=\n 928 amdgpu_dm_connector->dc_link &&\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ El parche a\u00f1ade esta verificaci\u00f3n de NULL pero ojal\u00e1 pueda ser eliminada\n\n 929 dc_connector_supports_analog(amdgpu_dm_connector->dc_link->link_id.id);\n 930\n 931 dc_link = amdgpu_dm_connector->dc_link;\n\ndc_link asignado aqu\u00ed.\n\n 932\n 933 /*\n 934 * Obtenga una referencia de irq del controlador base para las interrupciones hpd durante la vida \u00fatil\n 935 * de dm. Tenga en cuenta que solo los tipos de interrupci\u00f3n hpd se registran con\n 936 * el controlador base; los tipos hpd_rx no lo est\u00e1n. En otras palabras, amdgpu_irq_get/put en\n 937 * hpd_rx no est\u00e1 disponible. DM actualmente controla hpd_rx\n 938 * expl\u00edcitamente con dc_interrupt_set()\n 939 */\n--> 940 if (dc_link->irq_source_hpd != DC_IRQ_SOURCE_INVALID) {\n ^^^^^^^^^^^^^^^^^^^^^^^ Si es NULL, entonces tenemos problemas porque lo desreferenciamos aqu\u00ed.\n\n 941 irq_type = dc_link->irq_source_hpd - DC_IRQ_SOURCE_HPD1;\n 942 /*\n 943 * PENDIENTE: Hay una discrepancia entre mode_info.num_hpd\n 944 * y lo que la BIOS informa como el n\u00famero de conectores con hpd"}], "id": "CVE-2026-46245", "lastModified": "2026-11-06T17:17:53.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46245", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:12:46.754116Z", "version": "2.0.3"}}]}, "published": "2026-06-03T18:16:24.637", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0965f1e775130e325e74152d867d2e8ce865fa05"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d15503e454bf117a0d0078332d48df86a41c828"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/226a40c06a183abaeb7529a4f54d6c203bd14407"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a490e4d3c9fed1e690c8de348416eea3a9f054ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d772e8570f19ac05fd9b11c8af86ada98f35f0c8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amd/display: Fix dc_link NULL handling in HPD init", "id": "2484444", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484444"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's AMD GPU display driver. The `amdgpu_dm_hpd_init()` function, responsible for Hot-Plug Detect (HPD) initialization, may attempt to dereference a null `dc_link` when handling certain connectors. This unconditional dereference can lead to a system crash, allowing a local attacker to cause a Denial of Service (DoS)."], "name": "CVE-2026-46245", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46245\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46245\nhttps://lore.kernel.org/linux-cve-announce/2026060333-CVE-2026-46245-e1e8@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c,a490e4d3c9fed1e690c8de348416eea3a9f054ff)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c,226a40c06a183abaeb7529a4f54d6c203bd14407)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-03T18:45:40.188324+00:00", "updated": "2026-06-09T23:45:15.694904+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}