{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64055",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.030Z",
        "datePublished": "2026-07-19T15:39:37.077Z",
        "dateUpdated": "2026-07-20T13:42:52.779Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-20T13:42:52.779Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: cortina: Carry over frag counter\n\nThe gmac_rx() NAPI poll function assembles packets in an\nSKB from a ring buffer.\n\nIf the ring buffer gets completely emptied during a poll cycle,\nwe exit gmac_rx(), but the packet is not yet completely\nassembled in the SKB, yet the fragment counter frag_nr is\nreset to zero on the next invocation.\n\nSolve this by making the RX fragment counter a part of the\nport struct, and carry it over between invocations.\n\nReset the fragment counter only right after calling\nnapi_gro_frags(), on error (after calling napi_free_frags())\nor if stopping the port.\n\nReset it in some place where not strictly necessary just to\nemphasize what is going on.\n\nThis was found by Sashiko during normal patch review."
                }
            ],
            "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"
                    }
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/cortina/gemini.c"
                    ],
                    "versions": [
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "df31e3b64455293df1ea89c7da7d5c9bfbcdd253",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "7af1fabdee744b7995fe01b30b77dfc397657cb5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "78cf08b3be47c28f07008a76c932bad7cdffa9d8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "7123cf481e21b54eb6adc4cb0d8dc2876aeaee41",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "c373b34877afea61c89e0dd2e38948c624249b9b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "46806096f35b8d3dfa2f321ddd77f597edcdb85f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
                            "lessThan": "ebd8ec2b309e3a447851b456ccaf8fb39f3661e7",
                            "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/cortina/gemini.c"
                    ],
                    "versions": [
                        {
                            "version": "4.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.258",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.142",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.92",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.34",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.11",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "4.16",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "6.1.175"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "6.6.142"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "6.12.92"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "6.18.34"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "7.0.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.16",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7"
                }
            ],
            "title": "net: ethernet: cortina: Carry over frag counter",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}