net: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch_CVE-2026-43039

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch\n\nemac_dispatch_skb_zc() allocates a new skb via napi_alloc_skb() but\nnever copies the packet data from the XDP buffer into it. The skb is\npassed up the stack containing uninitialized heap memory instead of\nthe actual received packet, leaking kernel heap contents to userspace.\n\nCopy the received packet data from the XDP buffer into the skb using\nskb_copy_to_linear_data().\n\nAdditionally, remove the skb_mark_for_recycle() call since the skb is\nbacked by the NAPI page frag allocator, not page_pool. Marking a\nnon-page_pool skb for recycle causes the free path to return pages to\na page_pool that does not own them, corrupting page_pool state.\n\nThe non-ZC path (emac_rx_packet) does not have these issues because it\nuses napi_build_skb() to wrap the existing page_pool page directly,\nrequiring no copy, and correctly marks for recycle since the page comes\nfrom page_pool_dev_alloc_pages().",
    "published": "2026-05-01T14:15:36.698Z",
    "modified": "2026-05-03T05:46:18.623Z",
    "type": "cve",
    "title": "net: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/a968438d4fc17ee1dcdc3cfa490dcb5e7709cf76\nhttps://git.kernel.org/stable/c/5597dd284ff8c556c0b00f6a34473677426e3f81",
    "id": "CVE-2026-43039",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 7a64bb388df3cf091afdd047c701039a13acd3b4\nLinux Linux 7a64bb388df3cf091afdd047c701039a13acd3b4\nLinux Linux 6.19",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "7a64bb388df3cf091afdd047c701039a13acd3b4",
    "vendor": "Linux",
    "ai_description": "Linux kernel vulnerability allowing kernel heap contents to leak to userspace due to missing data copy and incorrect skb recycling in ZC RX dispatch",
    "ai_severity": "Critical",
    "ai_vendor": "The Linux Foundation",
    "ai_product": "Linux Kernel",
    "ai_version": "6.19, 7a64bb388df3cf091afdd047c701039a13acd3b4",
    "ai_score": 9.8
}