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{"bugzilla": {"description": "kernel: tmpfs: fix race on handling dquot rbtree", "id": "2278404", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278404"}, "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:\ntmpfs: fix race on handling dquot rbtree\nA syzkaller reproducer found a race while attempting to remove dquot\ninformation from the rb tree.\nFetching the rb_tree root node must also be protected by the\ndqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot()\nwill trigger a warning because it couldn't find a node in the tree, when\nthe real reason was the root node changing before the search starts:\nThread 1Thread 2\n- shmem_release_dquot()- shmem_{acquire,release}_dquot()\n- fetch ROOT- Fetch ROOT\n- acquire dqio_sem\n- wait dqio_sem\n- do something, triger a tree rebalance\n- release dqio_sem\n- acquire dqio_sem\n- start searching for the node, but\nfrom the wrong location, missing\nthe node, and triggering a warning.", "A vulnerability was found in the Linux Kernel's memory management subsystem, where a race condition while attempting to remove dquot information from the rb tree can lead to a kernel panic. The race condition occurs due to a lack of proper protections when fetching the rb_tree root node. Given the right timing, this could cause the shmem_relewase_dquot() function to trigger a panic because it cannot find a node in the tree, when the reason is that the root node was changed before the search starts. This issue can lead to system instability."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-27058", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-27058\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-27058\nhttps://lore.kernel.org/linux-cve-announce/2024050130-CVE-2024-27058-e8f6@gregkh/T"], "statement": "Red Hat Enterprise Linux is not impacted by this CVE, as this vulnerability does not affect the specific versions or configurations of the Linux kernel used in its distributions. This ensures that users of Red Hat Enterprise Linux are not exposed to the potential risks associated with this issue, and no further action or mitigation is necessary for systems running this operating system.", "threat_severity": "Moderate"}

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