wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom_CVE-2026-31552

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom\n\nSince upstream commit e75665dd0968 (\"wifi: wlcore: ensure skb headroom\nbefore skb_push\"), wl1271_tx_allocate() and with it\nwl1271_prepare_tx_frame() returns -EAGAIN if pskb_expand_head() fails.\nHowever, in wlcore_tx_work_locked(), a return value of -EAGAIN from\nwl1271_prepare_tx_frame() is interpreted as the aggregation buffer being\nfull. This causes the code to flush the buffer, put the skb back at the\nhead of the queue, and immediately retry the same skb in a tight while\nloop.\n\nBecause wlcore_tx_work_locked() holds wl->mutex, and the retry happens\nimmediately with GFP_ATOMIC, this will result in an infinite loop and a\nCPU soft lockup. Return -ENOMEM instead so the packet is dropped and\nthe loop terminates.\n\nThe problem was found by an experimental code review agent based on\ngemini-3.1-pro while reviewing backports into v6.18.y.",
    "published": "2026-04-24T14:33:19.065Z",
    "modified": "2026-04-27T14:04:00.328Z",
    "type": "cve",
    "title": "wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/980f793645540ca7a6318165cc12f49d5febeb99\nhttps://git.kernel.org/stable/c/12f9eef39e49716c763714bfda835a733d5f6dea\nhttps://git.kernel.org/stable/c/ceb46b40b021d21911ff8608ce4ed33c1264ad2f\nhttps://git.kernel.org/stable/c/a6dc74209462c4fe5a88718d2f3a5286886081c8\nhttps://git.kernel.org/stable/c/cfa64e2b3717be1da7c4c1aff7268a009e8c1610\nhttps://git.kernel.org/stable/c/46c670ff1ff466e5eccb3940f726586473dc053c\nhttps://git.kernel.org/stable/c/f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c\nhttps://git.kernel.org/stable/c/deb353d9bb009638b7762cae2d0b6e8fdbb41a69",
    "id": "CVE-2026-31552",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 88295a55fefe5414e64293638b6f7549646e58ed\nLinux Linux cd89a4656c03f8db0c57350aaec69cd3cfaa3522\nLinux Linux 745a0810dbc96a0471e5f5e627ba1e978c3116d4\nLinux Linux b167312390fdd461c81ead516f2b0b44e83a9edb\nLinux Linux 71de0b6e04bbee5575caf9a1e4d424e7dcc50018\nLinux Linux 689a7980e4788e13e766763d53569fb78dea2513\nLinux Linux e75665dd096819b1184087ba5718bd93beafff51\nLinux Linux e75665dd096819b1184087ba5718bd93beafff51\nLinux Linux 6.19",
    "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": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "88295a55fefe5414e64293638b6f7549646e58ed",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}