{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98850",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.376Z",
        "datePublished": "2026-10-18T15:50:50.062Z",
        "dateUpdated": "2026-10-21T12:57:29.795Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:57:29.795Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: prevent TX_RING byte count overflow\n\ntpacket_snd() drains every SEND_REQUEST frame in a TX ring and adds\neach valid packet length to the signed int len_sum. Userspace can\nrecycle completed frames concurrently, so a single blocking send call\nis not bounded by the ring size.\n\nAfter enough successful transmissions len_sum wraps into the negative\nrange. In particular, 65536 65535-byte frames followed by a 65007-byte\nframe produce 0xfffffdef, or -EIOCBQUEUED. sock_sendmsg_nosec() treats\nthat as an impossible return and triggers a BUG. On systems configured\nto panic on oops, a CAP_NET_RAW holder can panic the host kernel.\n\nStop before the next frame would make the byte count exceed INT_MAX.\nThe positive short count leaves that frame pending for a later send\ncall.\n\nA two-thread TPACKET_V2 reproducer triggered the BUG on an arm64 build\nof Linux 7.3-rc4. With this change, the same reproducer returned the\nexpected positive short count without an oops."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/packet/af_packet.c"
                    ],
                    "versions": [
                        {
                            "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
                            "lessThan": "ae169d318d5d23bac76ece90a7e2b5cb760ed043",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
                            "lessThan": "be12b221c0301111eeb023be04add3c6ad7c21fe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
                            "lessThan": "69ca64bbb528898916f309552053c32a04a36ebc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
                            "lessThan": "9fd63d284e251332f4874ef9023cde472f315f86",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
                            "lessThan": "2cf81fc9505b148b1b70068303ea6ea4b1212403",
                            "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/packet/af_packet.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.31",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.31",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.56",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.10",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "2.6.31",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.31",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.31",
                                    "versionEndExcluding": "6.18.56"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.31",
                                    "versionEndExcluding": "7.2.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.31",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ae169d318d5d23bac76ece90a7e2b5cb760ed043"
                },
                {
                    "url": "https://git.kernel.org/stable/c/be12b221c0301111eeb023be04add3c6ad7c21fe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/69ca64bbb528898916f309552053c32a04a36ebc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9fd63d284e251332f4874ef9023cde472f315f86"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2cf81fc9505b148b1b70068303ea6ea4b1212403"
                }
            ],
            "title": "net/packet: prevent TX_RING byte count overflow",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}