CVE-2026-43280

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This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe->pat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without\nfirst checking if pat_index is within [0, xe->pat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is a local DRM xe ioctl, reached by opening an xe DRM render device and issuing DRM_IOCTL_XE_VM_CREATE followed by DRM_IOCTL_XE_MADVISE. It is not reachable from network, adjacent, or physical input.\nAC:L - Exploitation requires only attacker-controlled ioctl arguments with type DRM_XE_MEM_RANGE_ATTR_PAT and an out-of-range pat_index; no race or hard-to-control state is required. A valid VM id can be created by the same unprivileged caller.\nPR:L - The ioctl is registered with DRM_RENDER_ALLOW and no DRM_AUTH, DRM_MASTER, or DRM_ROOT_ONLY gate, so a normal local user with access to the render node can reach it. It does not require real root or capabilities.\nUI:N - No victim action is needed after the attacker has local execution and device-node access. The attacker directly opens the DRM node and submits the ioctl.\nS:U - The bug is in the host kernel DRM driver and impacts kernel resources under the same security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The flaw is an attacker-controlled out-of-bounds kernel read from xe->pat.table via xe_pat_index_get_coh_mode(), with a u16 index range and no bounds check before the fix. Following the higher-severity rule for OOB kernel reads, this is scored as high confidentiality impact.\nI:N - The immediate primitive is an out-of-bounds read and validation oracle; the investigated path does not provide a direct kernel write or memory corruption primitive. A bad PAT value may be stored only if the OOB read happens to pass validation, but that does not establish arbitrary modification of protected data.\nA:H - Out-of-range pat_index values trigger WARN_ON in xe_pat_index_get_coh_mode(), and in hardened or panic_on_warn deployments this can panic the kernel. The same local user can repeatedly trigger the condition, so high availability impact is the higher defensible choice."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_vm_madvise.c"], "versions": [{"version": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "ffba51100ff61792fefbae11ca38ac1987a818dd", "status": "affected", "versionType": "git"}, {"version": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "79f52655567a6471ff3d0d6325ede91bb14461f4", "status": "affected", "versionType": "git"}, {"version": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "fbbe32618e97eff81577a01eb7d9adcd64a216d7", "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/xe/xe_vm_madvise.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "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": "6.18", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd"}, {"url": "https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4"}, {"url": "https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7"}], "title": "drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43280", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:15.978847Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:16:25.879Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43280", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:15.978847Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:16:16.539Z"}}], "cna": {"title": "drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.1, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is a local DRM xe ioctl, reached by opening an xe DRM render device and issuing DRM_IOCTL_XE_VM_CREATE followed by DRM_IOCTL_XE_MADVISE. It is not reachable from network, adjacent, or physical input.\nAC:L - Exploitation requires only attacker-controlled ioctl arguments with type DRM_XE_MEM_RANGE_ATTR_PAT and an out-of-range pat_index; no race or hard-to-control state is required. A valid VM id can be created by the same unprivileged caller.\nPR:L - The ioctl is registered with DRM_RENDER_ALLOW and no DRM_AUTH, DRM_MASTER, or DRM_ROOT_ONLY gate, so a normal local user with access to the render node can reach it. It does not require real root or capabilities.\nUI:N - No victim action is needed after the attacker has local execution and device-node access. The attacker directly opens the DRM node and submits the ioctl.\nS:U - The bug is in the host kernel DRM driver and impacts kernel resources under the same security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The flaw is an attacker-controlled out-of-bounds kernel read from xe->pat.table via xe_pat_index_get_coh_mode(), with a u16 index range and no bounds check before the fix. Following the higher-severity rule for OOB kernel reads, this is scored as high confidentiality impact.\nI:N - The immediate primitive is an out-of-bounds read and validation oracle; the investigated path does not provide a direct kernel write or memory corruption primitive. A bad PAT value may be stored only if the OOB read happens to pass validation, but that does not establish arbitrary modification of protected data.\nA:H - Out-of-range pat_index values trigger WARN_ON in xe_pat_index_get_coh_mode(), and in hardened or panic_on_warn deployments this can panic the kernel. 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This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe->pat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without\nfirst checking if pat_index is within [0, xe->pat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.18"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:02.301Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43280", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:16:25.879Z", "dateReserved": "2026-05-01T14:12:55.998Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-06T11:29:01.562Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe->pat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without\nfirst checking if pat_index is within [0, xe->pat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe: A\u00f1adir comprobaci\u00f3n de l\u00edmites en pat_index para prevenir una lectura de kernel fuera de l\u00edmites (OOB) en madvise\n\nCuando el usuario proporciona un valor pat_index inv\u00e1lido a trav\u00e9s del IOCTL de madvise, la funci\u00f3n xe_pat_index_get_coh_mode() realiza un acceso a un array sin validar los l\u00edmites. Esto permite a un usuario malicioso desencadenar una lectura de kernel fuera de l\u00edmites desde el array xe -> pat.table.\n\nLa vulnerabilidad existe porque la validaci\u00f3n en madvise_args_are_sane() llama directamente a xe_pat_index_get_coh_mode(xe, args -> pat_index.val) sin comprobar primero si pat_index est\u00e1 dentro de [0, xe -> pat.n_entries).\n\nAunque xe_pat_index_get_coh_mode() tiene un WARN_ON para detectar esto en compilaciones de depuraci\u00f3n, todav\u00eda realiza el acceso inseguro al array en kernels de producci\u00f3n.\n\nv2(Matthew Auld)\n- Usando array_index_nospec() para mitigar ataques Spectre cuando se usa el valor\n\nv3(Matthew Auld)\n- Poner las declaraciones al inicio del bloque\n\n(seleccionado de la confirmaci\u00f3n 944a3329b05510d55c69c2ef455136e2fc02de29)"}], "id": "CVE-2026-43280", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43280", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:16:15.978847Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:49.477", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise", "id": "2467141", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467141"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's drm/xe module. A local user can exploit this vulnerability by providing a malformed pat_index value through the madvise IOCTL. This allows the xe_pat_index_get_coh_mode() function to perform an out-of-bounds read from the xe->pat.table array, leading to information disclosure from kernel memory."], "name": "CVE-2026-43280", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43280\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43280\nhttps://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43280-bd23@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ada7486c5668db542a7d361268df931aca5b726a,ffba51100ff61792fefbae11ca38ac1987a818dd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ada7486c5668db542a7d361268df931aca5b726a,79f52655567a6471ff3d0d6325ede91bb14461f4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ada7486c5668db542a7d361268df931aca5b726a,fbbe32618e97eff81577a01eb7d9adcd64a216d7)"}}], "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": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.16,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.6,6.20.0)"}}, {"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": "2026-05-06T16:00:06.454413+00:00", "updated": "2026-05-08T21:15:05.405514+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}