CVE-2022-49894

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cxl/core/region.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "12316b9f7c18138ae656050cfd716728e27b7e2f", "status": "affected", "version": "384e624bb211b406db40edc900bb51af8bb267d0", "versionType": "git"}, {"lessThan": "a90accb358ae33ea982a35595573f7a045993f8b", "status": "affected", "version": "384e624bb211b406db40edc900bb51af8bb267d0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cxl/core/region.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2AE8E086-9C21-4A47-A505-C5DBF09AAA5A", "versionEndExcluding": "6.0.8", "versionStartIncluding": "6.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Fix region HPA ordering validation\n\nSome regions may not have any address space allocated. Skip them when\nvalidating HPA order otherwise a crash like the following may result:\n\n devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n [..]\n RIP: 0010:store_targetN+0x655/0x1740 [cxl_core]\n [..]\n Call Trace:\n <TASK>\n kernfs_fop_write_iter+0x144/0x200\n vfs_write+0x24a/0x4d0\n ksys_write+0x69/0xf0\n do_syscall_64+0x3a/0x90\n\nstore_targetN+0x655/0x1740:\nalloc_region_ref at drivers/cxl/core/region.c:676\n(inlined by) cxl_port_attach_region at drivers/cxl/core/region.c:850\n(inlined by) cxl_region_attach at drivers/cxl/core/region.c:1290\n(inlined by) attach_target at drivers/cxl/core/region.c:1410\n(inlined by) store_targetN at drivers/cxl/core/region.c:1453"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/region: Corregir la validaci\u00f3n del ordenamiento HPA de la regi\u00f3n. Algunas regiones pueden no tener ning\u00fan espacio de direcciones asignado. Om\u00edtalos al validar el orden de HPA; de lo contrario, puede producirse un fallo como el siguiente: devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9 BUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000 [..] RIP: 0010:store_targetN+0x655/0x1740 [cxl_core] [..] Seguimiento de llamadas: kernfs_fop_write_iter+0x144/0x200 vfs_write+0x24a/0x4d0 ksys_write+0x69/0xf0 do_syscall_64+0x3a/0x90 store_targetN+0x655/0x1740: alloc_region_ref at drivers/cxl/core/region.c:676 (integrado por) cxl_port_attach_region en drivers/cxl/core/region.c:850 (integrado por) cxl_region_attach en drivers/cxl/core/region.c:1290 (integrado por) attached_target en drivers/cxl/core/region.c:1410 (integrado por) store_targetN en drivers/cxl/core/region.c:1453"}], "id": "CVE-2022-49894", "lastModified": "2026-06-17T05:19:26.717", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49894", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T16:02:18.443986Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:14.417", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/12316b9f7c18138ae656050cfd716728e27b7e2f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a90accb358ae33ea982a35595573f7a045993f8b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: cxl/region: Fix region HPA ordering validation", "id": "2363457", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363457"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncxl/region: Fix region HPA ordering validation\nSome regions may not have any address space allocated. Skip them when\nvalidating HPA order otherwise a crash like the following may result:\ndevm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n[..]\nRIP: 0010:store_targetN+0x655/0x1740 [cxl_core]\n[..]\nCall Trace:\n<TASK>\nkernfs_fop_write_iter+0x144/0x200\nvfs_write+0x24a/0x4d0\nksys_write+0x69/0xf0\ndo_syscall_64+0x3a/0x90\nstore_targetN+0x655/0x1740:\nalloc_region_ref at drivers/cxl/core/region.c:676\n(inlined by) cxl_port_attach_region at drivers/cxl/core/region.c:850\n(inlined by) cxl_region_attach at drivers/cxl/core/region.c:1290\n(inlined by) attach_target at drivers/cxl/core/region.c:1410\n(inlined by) store_targetN at drivers/cxl/core/region.c:1453"], "name": "CVE-2022-49894", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49894\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49894\nhttps://lore.kernel.org/linux-cve-announce/2025050159-CVE-2022-49894-bc10@gregkh/T"], "statement": "A NULL pointer dereference was fixed in alloc_region_ref() in the cxl_region driver, which could occur when validating Host Physical Address (HPA) ordering for regions without address space allocated. The issue was triggered by attempting to access a NULL res field. Triggering this vulnerability requires privileged access to configure or modify CXL regions via sysfs interfaces, which is generally restricted to administrative users (root or equivalent).", "threat_severity": "Moderate"}

{}