{"schema":"threatline.record/2","record":{"id":"CVE-2026-99097","aliases":[],"summary":"tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99097","source_modified_at":"2026-10-26T14:52:03.824Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99097","source_modified_at":"2026-10-26T14:52:03.824Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99097","source_modified_at":"2026-10-26T14:52:03.824Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"Linux","ecosystem":null},"version":"65cb86860a80ffc6af897d53f5bd4b1733bca0ec","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T14:52:03.824Z","modified_at":"2026-10-26T14:52:03.824Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99097","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T14:52:03.824Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/65cb86860a80ffc6af897d53f5bd4b1733bca0ec"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c2a97703359e25ec7ef8b2b0ef32fb3982add90a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b7f925fd5226deb953c8dcdc9677d3fcc2717c00"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-26T14:52:03.824Z","content_hash":"8245499c4ea1eb1657d305dc611705fc0f9189e534b7d9218f9b39a24ff71faf"}}