CVSS
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Време до експлоатация
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Clamp mailbox output allocation to the payload size CXL_MEM_SEND_COMMAND bounds the user's in.size to the mailbox payload size but leaves out.size unbounded, then cxl_mbox_cmd_ctor() calls kvzalloc(out.size). A large out.size drives a huge allocation, above INT_MAX it WARNs and taints, and with panic_on_warn=1 it panics. The transport __cxl_pci_mbox_send_cmd() already clamps the response copy to min(out.size, payload_size, device len), so the output buffer is never written beyond payload_size. Clamp the allocation to payload_size too, matching the RAW path.
Засегнати продукти
- Linux Linux: 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди 123f6d154253939ce38f0ec0b6d1ba67f870e01f; 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди d2d40574b9b272ade32d0d77b140d990e7547f5f; 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди f5d2bbf0300f46307948864fbb97bce5097f4fe2; 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди 31d4841eca7c4b75751ca96d24339e19303337f2; 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди b4e11c731d6bee3b87315e055a1ca417c92dc1fc; 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 преди 8a13db9f899d149c3aab24abcb668121cfda5a4f
- Linux Linux: 5.12; преди 5.12; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък
История
- 17 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-93186
- https://nvd.nist.gov/vuln/detail/CVE-2026-93186
- https://git.kernel.org/stable/c/123f6d154253939ce38f0ec0b6d1ba67f870e01f
- https://git.kernel.org/stable/c/d2d40574b9b272ade32d0d77b140d990e7547f5f
- https://git.kernel.org/stable/c/f5d2bbf0300f46307948864fbb97bce5097f4fe2
- https://git.kernel.org/stable/c/31d4841eca7c4b75751ca96d24339e19303337f2
- https://git.kernel.org/stable/c/b4e11c731d6bee3b87315e055a1ca417c92dc1fc
- https://git.kernel.org/stable/c/8a13db9f899d149c3aab24abcb668121cfda5a4f