{"id":"CVE-2026-89818","published":"2026-09-16T11:16:47.113","lastModified":"2026-09-16T15:18:11.030","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check\n\nIf the supplied msg[2] (num_buffers) is 0x3FFFFFFF, the expression\n6 + num_buffers * 4 wraps to 2 and the bounds check passes, letting\nthe parser loop far past the end of the message BO. Triggering it\nadditionally requires a ~4GiB mapping so that msg[1] survives the\nearlier \"header does not fit in BO\" check.\n\nRewrite the test in division form, which is overflow-free by\nconstruction. Also update the message to reflect that msg is invalid.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/47799e1f893d47d8af231710a61065e3ec8a13e8","tags":[]},{"url":"https://git.kernel.org/stable/c/4d7390530853eb7befda9cc786e4c86e8ad7ac9e","tags":[]},{"url":"https://git.kernel.org/stable/c/6dceaeceaa7c8396339f3ea34b0110cb912ca61b","tags":[]},{"url":"https://git.kernel.org/stable/c/7e28853c78c20bb8ba4c1dba702430cd05e09f76","tags":[]},{"url":"https://git.kernel.org/stable/c/9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3","tags":[]},{"url":"https://git.kernel.org/stable/c/c2340281be4ddacb8c203e2bce59b126d1d6c4c8","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}