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{"bugzilla": {"description": "kernel: ref_tracker: implement use-after-free detection", "id": "2347703", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347703"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nref_tracker: implement use-after-free detection\nWhenever ref_tracker_dir_init() is called, mark the struct ref_tracker_dir\nas dead.\nTest the dead status from ref_tracker_alloc() and ref_tracker_free()\nThis should detect buggy dev_put()/dev_hold() happening too late\nin netdevice dismantle process.", "A vulnerability was found in the Linux kernel's ref_tracker subsystem, which can lead to a use-after-free condition due to improper handling of reference tracking during network device teardown. Specifically, when ref_tracker_dir_init() is invoked, it marks the associated ref_tracker_dir structure as dead. However, if functions such as dev_put() or dev_hold() are called after this point, particularly during the dismantling of network devices, they may operate on already freed memory, which can lead to memory corruption and system instability."], "name": "CVE-2022-49127", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49127\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49127\nhttps://lore.kernel.org/linux-cve-announce/2025022605-CVE-2022-49127-15e6@gregkh/T"], "statement": "While the NVD has assigned this vulnerability a High severity rating with a CVSS score of 7.8, this assessment represents a theoretical worst-case scenario. It presumes potential chaining of exploitation that could impact confidentiality or integrity. However, in the absence of a confirmed proof-of-concept, evidence of attacker control, or any demonstrated real-world exploitation, this rating likely overstates the immediate and practical risk to our environment.", "threat_severity": "Low"}

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