{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38341",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:24.005Z",
        "datePublished": "2025-07-10T08:15:10.928Z",
        "dateUpdated": "2026-08-05T12:01:13.843Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:01:13.843Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: avoid double free when failing to DMA-map FW msg\n\nThe semantics are that caller of fbnic_mbx_map_msg() retains\nthe ownership of the message on error. All existing callers\ndutifully free the page."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - All trigger paths are local — a world-readable hwmon sysfs read (`/sys/class/hwmon/hwmonN/temp1_input`, mode 0444), netdev open/close ownership messages, devlink flash, and the driver's own heartbeat/mailbox-refill timers. No remote peer data reaches this code path.\nAC:L - The vulnerable path can be invoked at will and repeatedly (each sensor read issues up to five mailbox messages), and the required `dma_map_single()` failure is reachable by driving IOVA/swiotlb pressure concurrently, so the attacker can influence both the trigger rate and the failure condition.\nPR:L - `fbnic_hwmon_is_visible()` exposes the sensor attributes as 0444, so any unprivileged local account can drive `fbnic_fw_xmit_tsene_read_msg()` into `fbnic_mbx_map_msg()`; the heartbeat and Rx-refill callers reach the same code with no user context at all.\nUI:N - No victim action is needed — the attacker reads a sysfs file directly, and the heartbeat/mailbox-refill paths execute autonomously.\nS:U - The double free corrupts the kernel's own page allocator state within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The `spin_unlock_irqrestore()` between the two `free_page()` calls opens a window for the page to be reallocated, so the second free hands an in-use page back to the allocator, allowing the attacker to obtain a page aliased with another allocation and read its contents.\nI:H - The same cross-allocation aliasing yields a write primitive over memory belonging to another owner (kernel structures or another task's pages), which is exploitable for control-flow hijacking or privilege escalation.\nA:H - With `CONFIG_DEBUG_VM` the second free hits `VM_BUG_ON_PAGE(page_ref_count(page) == 0)` for an immediate BUG/oops; otherwise the `_refcount` underflow and resulting use-after-free readily panic the kernel."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/meta/fbnic/fbnic_fw.c"
                    ],
                    "versions": [
                        {
                            "version": "da3cde08209ec1c915195c2331c275397f34a731",
                            "lessThan": "670179265ad787b9dd8e701601914618b8927755",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "da3cde08209ec1c915195c2331c275397f34a731",
                            "lessThan": "0a211e23852019ef55c70094524e87a944accbb5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "da3cde08209ec1c915195c2331c275397f34a731",
                            "lessThan": "5bd1bafd4474ee26f504b41aba11f3e2a1175b88",
                            "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/meta/fbnic/fbnic_fw.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.35",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.4",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "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": "6.11",
                                    "versionEndExcluding": "6.12.35"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.15.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.16"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/670179265ad787b9dd8e701601914618b8927755"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0a211e23852019ef55c70094524e87a944accbb5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5bd1bafd4474ee26f504b41aba11f3e2a1175b88"
                }
            ],
            "title": "eth: fbnic: avoid double free when failing to DMA-map FW msg",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}