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{"bugzilla": {"description": "kernel: net: ll_temac: Make sure to free skb when it is completely used", "id": "2282593", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282593"}, "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"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: ll_temac: Make sure to free skb when it is completely used\nWith the skb pointer piggy-backed on the TX BD, we have a simple and\nefficient way to free the skb buffer when the frame has been transmitted.\nBut in order to avoid freeing the skb while there are still fragments from\nthe skb in use, we need to piggy-back on the TX BD of the skb, not the\nfirst.\nWithout this, we are doing use-after-free on the DMA side, when the first\nBD of a multi TX BD packet is seen as completed in xmit_done, and the\nremaining BDs are still being processed.", "A vulnerability was found in the Linux kernel's ll_temac driver, where the skb (socket buffer) may be improperly freed after use. This can lead to a use-after-free issue, as fragments of the skb can still be in use while attempting to free it, causing instability in the system during data transmission."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47224", "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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47224\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47224\nhttps://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47224-8135@gregkh/T"], "statement": "None of the products shipped by Red Hat are affected by this vulnerability.", "threat_severity": "Moderate"}

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