{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99097",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.390Z",
        "datePublished": "2026-10-26T14:52:03.824Z",
        "dateUpdated": "2026-10-26T14:52:03.824Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-26T14:52:03.824Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()\n\ntee_dyn_shm_alloc_helper() derives nr_pages from a caller-supplied size\nand passes it to alloc_pages_exact() without checking it. For size == 0\nnr_pages is 0, and alloc_pages_exact(0) calls get_order(0), which is\ndocumented as undefined and returns BITS_PER_LONG - PAGE_SHIFT. The page\nallocator then trips its order > MAX_PAGE_ORDER warning and fails the\nallocation; on a panic_on_warn kernel that ends the boot.\n\nThis can be triggered by TEE_IOC_SHM_ALLOC with struct\ntee_ioctl_shm_alloc_data where size is 0.\n\nReject a zero page count, as register_shm_helper() already does for the\nregister path."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tee/tee_shm.c"
                    ],
                    "versions": [
                        {
                            "version": "cf4441503e20a0c0a36e0a98dcf57de3d3844c91",
                            "lessThan": "e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf4441503e20a0c0a36e0a98dcf57de3d3844c91",
                            "lessThan": "65cb86860a80ffc6af897d53f5bd4b1733bca0ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf4441503e20a0c0a36e0a98dcf57de3d3844c91",
                            "lessThan": "c2a97703359e25ec7ef8b2b0ef32fb3982add90a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf4441503e20a0c0a36e0a98dcf57de3d3844c91",
                            "lessThan": "b7f925fd5226deb953c8dcdc9677d3fcc2717c00",
                            "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/tee/tee_shm.c"
                    ],
                    "versions": [
                        {
                            "version": "6.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.11",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "7.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65cb86860a80ffc6af897d53f5bd4b1733bca0ec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2a97703359e25ec7ef8b2b0ef32fb3982add90a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b7f925fd5226deb953c8dcdc9677d3fcc2717c00"
                }
            ],
            "title": "tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}