{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43208",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.993Z",
        "datePublished": "2026-05-06T11:28:12.292Z",
        "dateUpdated": "2026-08-05T12:26:35.377Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:26:35.377Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not pass flow_id to set_rps_cpu()\n\nBlamed commit made the assumption that the RPS table for each receive\nqueue would have the same size, and that it would not change.\n\nCompute flow_id in set_rps_cpu(), do not assume we can use the value\ncomputed by get_rps_cpu(). Otherwise we risk out-of-bound access\nand/or crashes."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The vulnerable `get_rps_cpu()`/`set_rps_cpu()` path is reached while processing received network packets through the generic RX path. In a reasonable high-performance server deployment with RFS/aRFS enabled, a remote peer can drive this path by sending traffic to an exposed service.\nAC:L - Once the affected RFS/aRFS configuration exists, exploitation does not require winning an attacker-uncontrolled race; packets and flows can be generated repeatedly to hit mismatched per-queue flow table indexes. The requirement for RFS/aRFS-capable hardware and configuration is a deployment precondition for the affected subsystem.\nPR:N - The packet-processing trigger itself requires no kernel privileges or authentication from the remote attacker. Enabling/resizing the RPS/RFS tables requires init-namespace `CAP_NET_ADMIN`, but that is administrator configuration, not attacker privilege in the scored network scenario.\nUI:N - No victim user action is required after the network service and RFS/aRFS configuration are present. The vulnerable path runs automatically during packet receive processing.\nS:U - The impact is within the Linux kernel/networking security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - The stale `flow_id` can cause out-of-bounds reads from kernel `rps_dev_flow_table` memory. Because this is kernel memory corruption adjacent to attacker-influenced packet flow state, high confidentiality impact is defensible.\nI:H - The same out-of-bounds `rps_dev_flow` access can write fields such as `filter`, `hash`, `last_qtail`, and `cpu` outside the allocated table. Kernel out-of-bounds write memory corruption is scored as high integrity impact.\nA:H - The fix explicitly cites out-of-bound access and crashes, and an invalid vmalloc-backed table access can oops or panic the kernel. Repeated remote traffic can retrigger the fault on vulnerable configured systems."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/core/dev.c"
                    ],
                    "versions": [
                        {
                            "version": "48aa30443e52c9666d5cd5e67532e475f212337e",
                            "lessThan": "5455a232edea6b946b99449f15ca771a8874a5a6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "48aa30443e52c9666d5cd5e67532e475f212337e",
                            "lessThan": "ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "48aa30443e52c9666d5cd5e67532e475f212337e",
                            "lessThan": "8a8a9fac9efa6423fd74938b940cb7d731780718",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/core/dev.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "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": "6.18",
                                    "versionEndExcluding": "6.18.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.19.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "7.0"
                                }
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5455a232edea6b946b99449f15ca771a8874a5a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718"
                }
            ],
            "title": "net: do not pass flow_id to set_rps_cpu()",
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}