RDMA/irdma: Fix double free related to rereg_user_mr_CVE-2026-43120

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Fix double free related to rereg_user_mr\n\nIf IB_MR_REREG_TRANS is set during rereg_user_mr, the\numem will be released and a new one will be allocated\nin irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans\nfails after the new umem is allocated, it releases the umem,\nbut does not set iwmr->region to NULL. The problem is that\nthis failure is propagated to the user, who will then call\nibv_dereg_mr (as they should). Then, the dereg_mr path will\nsee a non-NULL umem and attempt to call ib_umem_release again.\n\nFix this by setting iwmr->region to NULL after ib_umem_release.\n\nFixed: 5ac388db27c4 (\"RDMA/irdma: Add support to re-register a memory region\")",
    "published": "2026-05-06T07:40:43.923Z",
    "modified": "2026-05-08T12:40:43.130Z",
    "type": "cve",
    "title": "RDMA/irdma: Fix double free related to rereg_user_mr",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e\nhttps://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0\nhttps://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0\nhttps://git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441\nhttps://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2",
    "id": "CVE-2026-43120",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25\nLinux Linux 5ac388db27c443dadfbb0b8b23fa7ccf429d901a\nLinux Linux 5ac388db27c443dadfbb0b8b23fa7ccf429d901a\nLinux Linux 5ac388db27c443dadfbb0b8b23fa7ccf429d901a\nLinux Linux 5ac388db27c443dadfbb0b8b23fa7ccf429d901a\nLinux Linux 6.7",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/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": "715fdb3b30541cc8180b7cdc6aa9f8c307afdf25",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}