{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49893", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.243Z", "datePublished": "2025-05-01T14:10:36.503Z", "dateUpdated": "2025-05-04T08:47:56.937Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:47:56.937Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Fix cxl_region leak, cleanup targets at region delete\n\nWhen a region is deleted any targets that have been previously assigned\nto that region hold references to it. Trigger those references to\ndrop by detaching all targets at unregister_region() time.\n\nOtherwise that region object will leak as userspace has lost the ability\nto detach targets once region sysfs is torn down."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cxl/core/region.c"], "versions": [{"version": "b9686e8c8e39d4072081ef078c04915ee51c8af4", "lessThan": "45d9fb4b758b9d602ee7776eb6754b0349946aad", "status": "affected", "versionType": "git"}, {"version": "b9686e8c8e39d4072081ef078c04915ee51c8af4", "lessThan": "0d9e734018d70cecf79e2e4c6082167160a0f13f", "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/cxl/core/region.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.8", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "6.0", "versionEndExcluding": "6.0.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/45d9fb4b758b9d602ee7776eb6754b0349946aad"}, {"url": "https://git.kernel.org/stable/c/0d9e734018d70cecf79e2e4c6082167160a0f13f"}], "title": "cxl/region: Fix cxl_region leak, cleanup targets at region delete", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"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 cxl_region leak, cleanup targets at region delete\n\nWhen a region is deleted any targets that have been previously assigned\nto that region hold references to it. Trigger those references to\ndrop by detaching all targets at unregister_region() time.\n\nOtherwise that region object will leak as userspace has lost the ability\nto detach targets once region sysfs is torn down."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/region: Se corrige la fuga de cxl_region y se limpian los objetivos al eliminar una regi\u00f3n. Al eliminar una regi\u00f3n, todos los objetivos previamente asignados a ella contienen referencias a ella. Para eliminar esas referencias, desvincula todos los objetivos durante la ejecuci\u00f3n de unregister_region(). De lo contrario, el objeto de regi\u00f3n se filtrar\u00e1, ya que el espacio de usuario ha perdido la capacidad de desvincular objetivos una vez que se desmantela el sistema operativo de la regi\u00f3n."}], "id": "CVE-2022-49893", "lastModified": "2025-11-10T21:18:45.070", "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"}]}, "published": "2025-05-01T15:16:14.317", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d9e734018d70cecf79e2e4c6082167160a0f13f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/45d9fb4b758b9d602ee7776eb6754b0349946aad"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: cxl/region: Fix cxl_region leak, cleanup targets at region delete", "id": "2363455", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363455"}, "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 cxl_region leak, cleanup targets at region delete\nWhen a region is deleted any targets that have been previously assigned\nto that region hold references to it. Trigger those references to\ndrop by detaching all targets at unregister_region() time.\nOtherwise that region object will leak as userspace has lost the ability\nto detach targets once region sysfs is torn down."], "name": "CVE-2022-49893", "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-2022-49893\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49893\nhttps://lore.kernel.org/linux-cve-announce/2025050158-CVE-2022-49893-209a@gregkh/T"], "statement": "A memory leak was fixed in the cxl_region subsystem where previously assigned endpoint decoders retained references to a deleted region object. Without explicit target detachment at the time of region removal, these references were never released, leading to a persistent leak. This issue can only be triggered by privileged users with access to region configuration via sysfs. Unprivileged users cannot create or delete CXL regions or assign decoders.", "threat_severity": "Moderate"}

{"created": "2025-06-24T09:44:13.898200+00:00", "updated": "2025-06-24T09:44:13.898267+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}