{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53393",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.402Z",
        "datePublished": "2026-07-19T12:01:56.684Z",
        "dateUpdated": "2026-08-17T04:50:44.847Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:50:44.847Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: reset write verifier on deferred writeback errors\n\nnfsd_vfs_write() and nfsd_commit() both call filemap_check_wb_err() to\ndetect deferred writeback errors, but neither rotates the server's write\nverifier (nn->writeverf) when this check fails. Every other\ndurable-storage-failure path in these functions calls\ncommit_reset_write_verifier() before returning an error.\n\nThe missing rotation means clients holding UNSTABLE write data under the\ncurrent verifier will COMMIT, receive the unchanged verifier back, and\nconclude their data is durable — silently dropping data that failed\nwriteback. This violates the UNSTABLE+COMMIT durability contract\n(RFC 1813 §3.3.7, RFC 8881 §18.32).\n\nAdd commit_reset_write_verifier() calls at both filemap_check_wb_err()\nerror sites, matching the pattern used by adjacent error paths in the\nsame functions. The helper already filters -EAGAIN and -ESTALE\ninternally, so the calls are unconditionally safe."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/nfsd/vfs.c"
                    ],
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                            "version": "f14816f2f928c560d28ba344af689f56efcd6f55",
                            "lessThan": "b8e5894e56cff70fa245628fe16f0ad6367f8090",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3145fe0ebb16e1715ad541a301bc6675c8375fcd",
                            "lessThan": "bc2baca02ec56da7707a74ed5d340b0a1dff1841",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "43b65d2997963e80e8d8d86520bcb1e0751227de",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "666e837b247fcadf2d8d508b9b0e49d720393eb4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "4367afc119c51e17a616f6908772b7e2c2c4013f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "b027cca33c97354149fcc0ddeede4525c41093cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "555dbf1a9aac6d3150c8b52fa35f768a692f4eeb",
                            "lessThan": "2090b05803faab8a9fa62fbff871007862cac1b7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.124",
                            "lessThan": "5.10.261",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.49",
                            "lessThan": "5.15.212",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/nfsd/vfs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.261",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.95",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.38",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.3",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "5.10.124",
                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.49",
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b8e5894e56cff70fa245628fe16f0ad6367f8090"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bc2baca02ec56da7707a74ed5d340b0a1dff1841"
                },
                {
                    "url": "https://git.kernel.org/stable/c/43b65d2997963e80e8d8d86520bcb1e0751227de"
                },
                {
                    "url": "https://git.kernel.org/stable/c/666e837b247fcadf2d8d508b9b0e49d720393eb4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4367afc119c51e17a616f6908772b7e2c2c4013f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b027cca33c97354149fcc0ddeede4525c41093cd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2090b05803faab8a9fa62fbff871007862cac1b7"
                }
            ],
            "title": "nfsd: reset write verifier on deferred writeback errors",
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}