{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64068",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.030Z",
        "datePublished": "2026-07-19T15:39:45.306Z",
        "dateUpdated": "2026-08-05T12:38:52.223Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:38:52.223Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix missing locking around retry adding new subreqs\n\nFix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take\nthe appropriate lock when adding extra subrequests into\nstream->subrequests."
                }
            ],
            "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"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The bug is in netfs client retry logic reached when CIFS, Ceph, AFS, or fscache-backed NFS processes I/O responses from a remote server; a malicious or MITM server can trigger retries and race the collector via crafted protocol replies.\nAC:L - An attacker controlling the remote server can force NEED_RETRY conditions and time fast completions during subrequest splitting; they control both sides of the race by sending concurrent responses while the client retries.\nPR:N - Exploitation requires no privileges on the victim host; a remote attacker only needs the client to have an active mount and any process to perform normal reads or writes against it.\nUI:N - No victim interaction beyond routine filesystem access on an already-mounted share; readahead, writeback, and daemon I/O can trigger the race without deliberate user action.\nS:U - Impact is kernel memory corruption and potential privilege escalation within the kernel; it does not cross a VM, container, or IOMMU security boundary.\nC:H - Concurrent unsynchronized list manipulation of refcounted subrequest objects can cause use-after-free, enabling arbitrary kernel memory disclosure.\nI:H - List corruption and use-after-free on heap-allocated subrequests can be leveraged for arbitrary kernel writes and control-flow hijacking.\nA:H - The race can corrupt the subrequest list and trigger kernel oops, panic, or use-after-free crashes during normal network filesystem I/O retries."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/netfs/read_retry.c",
                        "fs/netfs/write_retry.c"
                    ],
                    "versions": [
                        {
                            "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068",
                            "lessThan": "393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068",
                            "lessThan": "cce18c263e9623872327ba3c956012f73c1179cc",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/netfs/read_retry.c",
                        "fs/netfs/write_retry.c"
                    ],
                    "versions": [
                        {
                            "version": "6.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.10",
                            "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": "6.10",
                                    "versionEndExcluding": "7.0.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cce18c263e9623872327ba3c956012f73c1179cc"
                }
            ],
            "title": "netfs: Fix missing locking around retry adding new subreqs",
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}