{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43239",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.995Z",
        "datePublished": "2026-05-06T11:28:33.623Z",
        "dateUpdated": "2026-08-05T12:26:49.440Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:26:49.440Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: prevent races in ->query_interfaces()\n\nIt was possible for two query interface works to be concurrently trying\nto update the interfaces.\n\nPrevent this by checking and updating iface_last_update under\niface_lock."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The vulnerable SMB client code processes FSCTL_QUERY_NETWORK_INTERFACE_INFO responses supplied by a remote SMB server over the network.\nAC:L - The required SMB3/multichannel capability and response timing can be controlled by a malicious server, and concurrent interface queries can be induced through normal mounted-session refresh/reconnect behavior.\nPR:N - The attacker needs no privileges on the victim system; a malicious or compromised SMB server can supply the responses once the client connects.\nUI:R - Exploitation requires the victim system or user to mount/connect to the SMB share, which is user interaction under the provided guidance.\nS:U - The impact is within the client kernel that contains the vulnerable SMB client component, without crossing a separate security authority such as a VM boundary.\nC:H - The race can corrupt the kernel-maintained cifs_server_iface linked list/refcount state, and kernel heap/list corruption is defensibly treated as potentially exposing arbitrary kernel memory.\nI:H - The same kernel list corruption can plausibly be leveraged beyond a simple fault into kernel memory corruption or code execution, so integrity impact is high under the required higher-severity rule.\nA:H - Even without full exploitation, the race can corrupt interface-list state and trigger kernel oops/panic or hang in the SMB client path."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
                            "lessThan": "93e8e3ee165ae4609a1222b516b573837103d2c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
                            "lessThan": "ab6564f416a6eaf1199200b6100952407b438f7d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
                            "lessThan": "6287eefaf21ec805d42f941bd368018cf397a7f5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
                            "lessThan": "76cc4faba0343c6db945b8dc75425b33d633e1b8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
                            "lessThan": "c3c06e42e1527716c54f3ad2ced6a034b5f3a489",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.128",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.16",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.6",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "5.19",
                                    "versionEndExcluding": "6.6.128"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.18.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.19.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489"
                }
            ],
            "title": "smb: client: prevent races in ->query_interfaces()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}