{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23069",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.954Z",
        "datePublished": "2026-02-04T16:07:49.911Z",
        "dateUpdated": "2026-06-11T18:44:11.093Z"
    },
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                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:59:23.999Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix potential underflow in virtio_transport_get_credit()\n\nThe credit calculation in virtio_transport_get_credit() uses unsigned\narithmetic:\n\n  ret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt);\n\nIf the peer shrinks its advertised buffer (peer_buf_alloc) while bytes\nare in flight, the subtraction can underflow and produce a large\npositive value, potentially allowing more data to be queued than the\npeer can handle.\n\nReuse virtio_transport_has_space() which already handles this case and\nadd a comment to make it clear why we are doing that.\n\n[Stefano: use virtio_transport_has_space() instead of duplicating the code]\n[Stefano: tweak the commit message]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/vmw_vsock/virtio_transport_common.c"
                    ],
                    "versions": [
                        {
                            "version": "06a8fc78367d070720af960dcecec917d3ae5f3b",
                            "lessThan": "d96de882d6b99955604669d962ae14e94b66a551",
                            "status": "affected",
                            "versionType": "git"
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                            "lessThan": "02f9af192b98d15883c70dd41ac76d1b0217c899",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "06a8fc78367d070720af960dcecec917d3ae5f3b",
                            "lessThan": "d05bc313788f0684b27f0f5b60c52a844669b542",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "06a8fc78367d070720af960dcecec917d3ae5f3b",
                            "lessThan": "ec0f1b3da8061be3173d1c39faaf9504f91942c3",
                            "status": "affected",
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                    ]
                },
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                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/vmw_vsock/virtio_transport_common.c"
                    ],
                    "versions": [
                        {
                            "version": "4.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.162",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.122",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.68",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.8",
                            "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": "4.8",
                                    "versionEndExcluding": "6.1.162"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.6.122"
                                },
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                                    "versionStartIncluding": "4.8",
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.19"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d96de882d6b99955604669d962ae14e94b66a551"
                },
                {
                    "url": "https://git.kernel.org/stable/c/02f9af192b98d15883c70dd41ac76d1b0217c899"
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                {
                    "url": "https://git.kernel.org/stable/c/d05bc313788f0684b27f0f5b60c52a844669b542"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ec0f1b3da8061be3173d1c39faaf9504f91942c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3ef3d52a1a9860d094395c7a3e593f3aa26ff012"
                }
            ],
            "title": "vsock/virtio: fix potential underflow in virtio_transport_get_credit()",
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