CVE-2026-99097 (GCVE-0-2026-99097)

Vulnerability from cvelistv5 – Published: 2026-10-26 14:52 – Updated: 2026-10-26 14:52
VLAI
Title
tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()
Summary
In the Linux kernel, the following vulnerability has been resolved: tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() tee_dyn_shm_alloc_helper() derives nr_pages from a caller-supplied size and passes it to alloc_pages_exact() without checking it. For size == 0 nr_pages is 0, and alloc_pages_exact(0) calls get_order(0), which is documented as undefined and returns BITS_PER_LONG - PAGE_SHIFT. The page allocator then trips its order > MAX_PAGE_ORDER warning and fails the allocation; on a panic_on_warn kernel that ends the boot. This can be triggered by TEE_IOC_SHM_ALLOC with struct tee_ioctl_shm_alloc_data where size is 0. Reject a zero page count, as register_shm_helper() already does for the register path.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cf4441503e20a0c0a36e0a98dcf57de3d3844c91 , < e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d (git)
Affected: cf4441503e20a0c0a36e0a98dcf57de3d3844c91 , < 65cb86860a80ffc6af897d53f5bd4b1733bca0ec (git)
Affected: cf4441503e20a0c0a36e0a98dcf57de3d3844c91 , < c2a97703359e25ec7ef8b2b0ef32fb3982add90a (git)
Affected: cf4441503e20a0c0a36e0a98dcf57de3d3844c91 , < b7f925fd5226deb953c8dcdc9677d3fcc2717c00 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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    "dateReserved": "2026-09-25T10:25:14.390Z",
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          }
        ],
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        "metrics": {},
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}



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