{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40311",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.185Z",
        "datePublished": "2025-12-08T00:46:36.903Z",
        "dateUpdated": "2026-05-11T21:46:54.066Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:46:54.066Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/habanalabs: support mapping cb with vmalloc-backed coherent memory\n\nWhen IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return\naddresses from the vmalloc range. If such an address is mapped without\nVM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the\nVM_PFNMAP restriction.\n\nFix this by checking for vmalloc addresses and setting VM_MIXEDMAP\nin the VMA before mapping. This ensures safe mapping and avoids kernel\ncrashes. The memory is still driver-allocated and cannot be accessed\ndirectly by userspace."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/accel/habanalabs/gaudi/gaudi.c",
                        "drivers/accel/habanalabs/gaudi2/gaudi2.c"
                    ],
                    "versions": [
                        {
                            "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
                            "lessThan": "7ec8ac9f73d4a9438c2186768d6de27ace37531e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
                            "lessThan": "d1dfe21a332d38a6a09658ec29a55940afb5fe36",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
                            "lessThan": "73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399",
                            "lessThan": "513024d5a0e34fd34247043f1876b6138ca52847",
                            "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/accel/habanalabs/gaudi/gaudi.c",
                        "drivers/accel/habanalabs/gaudi2/gaudi2.c"
                    ],
                    "versions": [
                        {
                            "version": "5.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.117",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.58",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.8",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "5.8",
                                    "versionEndExcluding": "6.6.117"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "6.12.58"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "6.17.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36"
                },
                {
                    "url": "https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847"
                }
            ],
            "title": "accel/habanalabs: support mapping cb with vmalloc-backed coherent memory",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}