{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23206",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.986Z",
        "datePublished": "2026-02-14T16:27:29.095Z",
        "dateUpdated": "2026-05-11T22:02:22.500Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:02:22.500Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero\n\nThe driver allocates arrays for ports, FDBs, and filter blocks using\nkcalloc() with ethsw->sw_attr.num_ifs as the element count. When the\ndevice reports zero interfaces (either due to hardware configuration\nor firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)\ninstead of NULL.\n\nLater in dpaa2_switch_probe(), the NAPI initialization unconditionally\naccesses ethsw->ports[0]->netdev, which attempts to dereference\nZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.\n\nAdd a check to ensure num_ifs is greater than zero after retrieving\ndevice attributes. This prevents the zero-sized allocations and\nsubsequent invalid pointer dereference."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
                    ],
                    "versions": [
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "2fcccca88456b592bd668db13aa1d29ed257ca2b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "80165ff16051448d6f840585ebe13f2400415df3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "b97415c4362f739e25ec6f71012277086fabdf6f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "4acc40db06ffd0fd92683505342b00c8a7394c60",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "155eb99aff2920153bf21217ae29565fff81e6af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b1b71370458860579831e77485883fcf2e8fbbe",
                            "lessThan": "ed48a84a72fefb20a82dd90a7caa7807e90c6f66",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
                    ],
                    "versions": [
                        {
                            "version": "5.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.200",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.163",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.124",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.70",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.10",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "5.13",
                                    "versionEndExcluding": "5.15.200"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.1.163"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.6.124"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.12.70"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.18.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60"
                },
                {
                    "url": "https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66"
                }
            ],
            "title": "dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero",
            "x_generator": {
                "engine": "bippy-1.2.0"
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}