CVE-2026-23468

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Although the previous multiplication overflow check\nprevents out-of-bounds allocation, a large number of entries could still\ncause excessive memory allocation (up to potentially gigabytes) and\nunnecessarily long list processing times.\n\nIntroduce a hard limit of 128k entries per BO list, which is more than\nsufficient for any realistic use case (e.g., a single list containing all\nbuffers in a large scene). This prevents memory exhaustion attacks and\nensures predictable performance.\n\nReturn -EINVAL if the requested entry count exceeds the limit\n\n(cherry picked from commit 688b87d39e0aa8135105b40dc167d74b5ada5332)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amdgpu: Limitar el n\u00famero de entradas de la lista BO para prevenir el agotamiento de recursos\n\nEl espacio de usuario puede pasar un n\u00famero arbitrario de entradas de la lista BO a trav\u00e9s del campo bo_number. Aunque la comprobaci\u00f3n previa de desbordamiento de multiplicaci\u00f3n previene la asignaci\u00f3n fuera de l\u00edmites, un gran n\u00famero de entradas a\u00fan podr\u00eda causar una asignaci\u00f3n excesiva de memoria (potencialmente hasta gigabytes) y tiempos de procesamiento de lista innecesariamente largos.\n\nSe introduce un l\u00edmite estricto de 128k entradas por lista BO, lo cual es m\u00e1s que suficiente para cualquier caso de uso realista (por ejemplo, una \u00fanica lista que contenga todos los b\u00faferes en una escena grande). Esto previene ataques de agotamiento de memoria y asegura un rendimiento predecible.\n\nDevolver -EINVAL si el n\u00famero de entradas solicitado excede el l\u00edmite\n\n(cherry picked from commit 688b87d39e0aa8135105b40dc167d74b5ada5332)"}], "id": "CVE-2026-23468", "lastModified": "2026-11-05T22:18:27.610", "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-2026-23468", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:31:38.433589Z", "version": "2.0.3"}}]}, "published": "2026-04-03T16:16:34.330", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2723e6851309531ce61aed74e93a0cd268cc862a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5ce4a38e6c2488949e373d5066303f9c128db614"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6270b1a5dab94665d7adce3dc78bc9066ed28bdd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c833d6c7199c5b5fca9ec95593acd539ec9c171c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e620378aab78d415bd8a15a2f91c145906520288"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f462624a6e4b5f1ec2664c2c53e408b2f4fb53e9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amdgpu: Limit BO list entry count to prevent resource exhaustion", "id": "2454848", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454848"}, "csaw": false, "cwe": "CWE-770", "details": ["A flaw was found in the Linux kernel's drm/amdgpu component. A local user can exploit this vulnerability by providing an excessively large number of Buffer Object (BO) list entries through the bo_number field. This can lead to excessive memory allocation and prolonged processing times, potentially causing a memory exhaustion attack and resulting in a Denial of Service (DoS) for the system."], "name": "CVE-2026-23468", "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": "2026-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23468\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23468\nhttps://lore.kernel.org/linux-cve-announce/2026040321-CVE-2026-23468-8be9@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,5ce4a38e6c2488949e373d5066303f9c128db614)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f462624a6e4b5f1ec2664c2c53e408b2f4fb53e9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6270b1a5dab94665d7adce3dc78bc9066ed28bdd)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.20,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.10,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc5,*]"}}], "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": "2026-04-03T21:13:30.870014+00:00", "updated": "2026-05-26T17:00:13.124034+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}