CVE-2022-49893

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{"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"]}