CVE-2026-99097tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper()
- —Not scoredno CVSS score yet
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 31 days later
· 31 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected cf4441503e20a0c0a36e0a98dcf57de3d3844c91 – < e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d
- affected cf4441503e20a0c0a36e0a98dcf57de3d3844c91 – < 65cb86860a80ffc6af897d53f5bd4b1733bca0ec
- affected cf4441503e20a0c0a36e0a98dcf57de3d3844c91 – < c2a97703359e25ec7ef8b2b0ef32fb3982add90a
- affected cf4441503e20a0c0a36e0a98dcf57de3d3844c91 – < b7f925fd5226deb953c8dcdc9677d3fcc2717c00
- affected 6.10
- unaffected < 6.10
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.11 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/e5dc7af9c3a5373ee7a84959126e7dfa9e4ad50d (opens in a new tab)
- https://git.kernel.org/stable/c/65cb86860a80ffc6af897d53f5bd4b1733bca0ec (opens in a new tab)
- https://git.kernel.org/stable/c/c2a97703359e25ec7ef8b2b0ef32fb3982add90a (opens in a new tab)
- https://git.kernel.org/stable/c/b7f925fd5226deb953c8dcdc9677d3fcc2717c00 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-109903 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-99097)Record last updated .