{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99057",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.388Z",
        "datePublished": "2026-10-23T12:22:44.683Z",
        "dateUpdated": "2026-10-23T12:22:44.683Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-23T12:22:44.683Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netfront: don't leak the skb when xennet_fill_frags() fails\n\nWhen a response chain has more slots than fit in the skb's frags,\nxennet_fill_frags() returns an error and xennet_poll() jumps to its\nerror path.  That path moves what's left on tmpq to errq to be freed,\nbut the skb being filled was already dequeued from tmpq, so it's never\nfreed.  Each chain that overflows leaks the skb and the pages attached\nto it as frags, and the backend decides how many slots it sends.\n\nPut the skb back on tmpq before taking the error path, like the\nxennet_set_skb_gso() failure just above it does."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/xen-netfront.c"
                    ],
                    "versions": [
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "5051df031144753d3e18862514969146b601d089",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "99011a11c97340ef7290df7dc199305c73fab2f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "086944c1c2cbb683543bc3ff08637847b03c8009",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "84e3ea6502b5f14ce8d499d0b6e0e38386274cf0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
                            "lessThan": "93ccaf1c26e2133396173b76a071e59024daa622",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bd1468048aa3e2af865da92990539946d4483989",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29a6193c0d74390c004808441061ac1812cf6f51",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b73a161e9beff24bf1803ba393dff95a255268f9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4.4.159",
                            "lessThan": "4.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.9.130",
                            "lessThan": "4.10",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.73",
                            "lessThan": "4.15",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.18.11",
                            "lessThan": "4.19",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/xen-netfront.c"
                    ],
                    "versions": [
                        {
                            "version": "4.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.19",
                            "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": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.11",
                            "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": "4.19",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "7.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.4.159"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.9.130"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.14.73"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.18.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5051df031144753d3e18862514969146b601d089"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99011a11c97340ef7290df7dc199305c73fab2f2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/086944c1c2cbb683543bc3ff08637847b03c8009"
                },
                {
                    "url": "https://git.kernel.org/stable/c/84e3ea6502b5f14ce8d499d0b6e0e38386274cf0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/93ccaf1c26e2133396173b76a071e59024daa622"
                }
            ],
            "title": "xen/netfront: don't leak the skb when xennet_fill_frags() fails",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}