{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99276",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.405Z",
        "datePublished": "2026-11-07T14:08:46.432Z",
        "dateUpdated": "2026-11-07T14:08:46.432Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-11-07T14:08:46.432Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: defer connection scavenging while session locks are busy\n\nThe expiration worker holds conn_list_lock for reading while checking\nfor authenticated sessions. Without this change, the check can wait for\nconn->session_lock or sessions_table_lock.\n\nIn destroy_previous_session(), the status updates after\nksmbd_conn_wait_idle_sess() run with both session locks held for\nwriting. Both the KSMBD_SESS_GOOD error path and the\nKSMBD_SESS_NEED_SETUP success path call ksmbd_all_conn_set_status(),\nwhich takes conn_list_lock for reading.\n\nA writer queued on conn_list_lock can block these new read acquisitions.\nThe worker then waits for a session lock held by\ndestroy_previous_session(), which waits behind the writer. The writer\ncannot proceed until the worker releases conn_list_lock.\n\nTry both session locks instead of waiting in the scavenging check. Keep\nthe connection when either lock is busy and let the periodic worker\nretry later."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/mgmt/user_session.c"
                    ],
                    "versions": [
                        {
                            "version": "d7fd1f98607f2cd358e583f9548bdf0173090a86",
                            "lessThan": "4e4e8b38994a0b0fc23f00ca6698b469a41abe70",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d7fd1f98607f2cd358e583f9548bdf0173090a86",
                            "lessThan": "b4bae7af1154089be87c7475218264fcbfd16d10",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c99ea7855124ca1428a1e59c2b4590aaef34eacf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7.2.8",
                            "lessThan": "7.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/mgmt/user_session.c"
                    ],
                    "versions": [
                        {
                            "version": "7.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3.2",
                            "lessThanOrEqual": "7.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.4-rc1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.3",
                                    "versionEndExcluding": "7.3.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.3",
                                    "versionEndExcluding": "7.4-rc1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.2.8"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4e4e8b38994a0b0fc23f00ca6698b469a41abe70"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b4bae7af1154089be87c7475218264fcbfd16d10"
                }
            ],
            "title": "ksmbd: defer connection scavenging while session locks are busy",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}