{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53638",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-10-07T15:16:59.658Z",
        "datePublished": "2025-10-07T15:19:38.989Z",
        "dateUpdated": "2026-08-05T09:15:16.890Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T09:15:16.890Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteon_ep: cancel queued works in probe error path\n\nIf it fails to get the devices's MAC address, octep_probe exits while\nleaving the delayed work intr_poll_task queued. When the work later\nruns, it's a use after free.\n\nMove the cancelation of intr_poll_task from octep_remove into\noctep_device_cleanup. This does not change anything in the octep_remove\nflow, but octep_device_cleanup is called also in the octep_probe error\npath, where the cancelation is needed.\n\nNote that the cancelation of ctrl_mbox_task has to follow\nintr_poll_task's, because the ctrl_mbox_task may be queued by\nintr_poll_task."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable code is the PCI probe path of the octeon_ep driver, reached via local device enumeration, hotplug, module load, or sysfs bind/unbind on the host. No remote network protocol handling is involved.\nAC:H - Exploitation requires `octep_probe()` to fail after the poll work is queued — i.e. the Octeon endpoint firmware must fail to answer the MAC-address mailbox request within the 500 ms timeout (or register_netdev must fail), a device/firmware state an attacker on the host cannot reliably force. Turning the resulting UAF into more than an oops additionally requires reclaiming the freed netdev allocation within the ~50 ms work delay.\nPR:L - The UAF fires from a workqueue with no host credentials needed once probe fails, and the probe can be re-triggered through driver bind/unbind; a low-privileged attacker suffices to be present when the freed object is reclaimed, so PR is not raised to High.\nUI:N - The delayed work fires automatically 50 ms after the probe error path frees the device; no victim action is required beyond the normal device probe that happens at boot or hotplug.\nS:U - Both the vulnerable code and the corrupted memory are in the host kernel, so the impact stays within a single security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The work handler reads `oct->poll_non_ioq_intr` and the `hw_ops` function-pointer table out of freed slab memory; controlling the reclaiming allocation gives an attacker a read primitive over kernel heap contents and leaks kernel state.\nI:H - `queue_delayed_work()` and `queue_work()` write into the freed work/timer structures, and `oct->hw_ops.poll_non_ioq_interrupts(oct)` is an indirect call through a function pointer read from freed memory — a direct control-flow hijack primitive once the allocation is sprayed.\nA:H - Even unexploited, the work dereferences freed memory and accesses already-iounmap'ed MMIO, reliably producing a kernel oops/panic (this is the crash the fix was written for)."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/marvell/octeon_ep/octep_main.c"
                    ],
                    "versions": [
                        {
                            "version": "24d4333233b378114106a1327d3d635a004f4387",
                            "lessThan": "62312e2f6466b5f0a120542a38b410d88a34ed00",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "24d4333233b378114106a1327d3d635a004f4387",
                            "lessThan": "758c91078165ae641b698750a72eafe7968b3756",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/marvell/octeon_ep/octep_main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.12",
                            "lessThanOrEqual": "6.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.5",
                            "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": "6.4",
                                    "versionEndExcluding": "6.4.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/62312e2f6466b5f0a120542a38b410d88a34ed00"
                },
                {
                    "url": "https://git.kernel.org/stable/c/758c91078165ae641b698750a72eafe7968b3756"
                }
            ],
            "title": "octeon_ep: cancel queued works in probe error path",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}