net: tls: fix strparser anchor skb leak on offload RX setup failure_CVE-2026-52974

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: fix strparser anchor skb leak on offload RX setup failure\n\nWhen tls_set_device_offload_rx() fails at tls_dev_add(), the error path\ncalls tls_sw_free_resources_rx() to clean up the SW context that was\ninitialized by tls_set_sw_offload(). This function calls\ntls_sw_release_resources_rx() (which stops the strparser via\ntls_strp_stop()) and tls_sw_free_ctx_rx() (which kfrees the context),\nbut never frees the anchor skb that was allocated by alloc_skb(0) in\ntls_strp_init().\n\nNote that tls_sw_free_resources_rx() is exclusively used for this\n\"failed to start offload\" code path, there's no other caller.\n\nThe leak did not exist before commit 84c61fe1a75b (\"tls: rx: do not use\nthe standard strparser\"), because the standard strparser doesn't try\nto pre-allocate an skb.\n\nThe normal close path in tls_sk_proto_close() handles cleanup by calling\ntls_sw_strparser_done() (which calls tls_strp_done()) after dropping\nthe socket lock, because tls_strp_done() does cancel_work_sync() and\nthe strparser work handler takes the socket lock.",
    "published": "2026-06-24T16:28:51.826Z",
    "modified": "2026-06-28T06:37:28.883Z",
    "type": "cve",
    "title": "net: tls: fix strparser anchor skb leak on offload RX setup failure",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/0c9f399b37ce22a5ed94cc51f03ed07ac7f38e32\nhttps://git.kernel.org/stable/c/688f12aa44511dd57e448eb670075c6302ad1dc1\nhttps://git.kernel.org/stable/c/3c405dfa9619e506e75b8e41f8b29a5b99731877\nhttps://git.kernel.org/stable/c/9c54e76f8d6eb11735918777ef0e0509e089557d\nhttps://git.kernel.org/stable/c/bd07fe6c38b9e44ff3fc02692a53f095c5cc9afc\nhttps://git.kernel.org/stable/c/58689498ca3384851145a754dbb1d8ed1cf9fb54",
    "id": "CVE-2026-52974",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 84c61fe1a75b4255df1e1e7c054c9e6d048da417\nLinux Linux 6.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}