{"id":"CVE-2026-89818","revision":"7f5fd09858ab4285be9d0fa65d79da7a","records":[{"revision":"7f5fd09858ab4285be9d0fa65d79da7a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89818","aliases":[],"title":"drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check","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.","state":0,"publishedAt":"2026-09-16T10:30:50.946+00:00","modifiedAt":"2026-10-19T08:53:12.347+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c\",\n                        \"drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"88411caee8f576d6b5abf6531232fcc0ce756dc5\",\n                            \"lessThan\": \"c2340281be4ddacb8c203e2bce59b126d1d6c4c8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e\",\n                            \"lessThan\": \"6dceaeceaa7c8396339f3ea34b0110cb912ca61b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7688143ca62edeecacb3ba0a2cea129dbd262a18\",\n                            \"lessThan\": \"47799e1f893d47d8af231710a61065e3ec8a13e8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"63b51e8a9d54317d31cc3856c1e12407070d5fc2\",\n                            \"lessThan\": \"7e28853c78c20bb8ba4c1dba702430cd05e09f76\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b193019860d61e92da395eae2011f2f6716b182f\",\n                            \"lessThan\": \"9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b193019860d61e92da395eae2011f2f6716b182f\",\n                            \"lessThan\": \"4d7390530853eb7befda9cc786e4c86e8ad7ac9e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f55552adb100eb54a6e6dabff4fbdc8679bd3fa0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82c535eff05490c71153af57de9fe85502fcb5d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"638d3e0b9eb77aa53fdd60e2b928761d16ba76fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"870c8738c3774336baedddd0240951d078a703b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"638e48ee39d0f2af9336f917a6f5d6692dd64d93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c817a60b09eaab926e475088e750936efcc95ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThan\": \"6.1.188\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.140\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.90\",\n                            \"lessThan\": \"6.12.110\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.32\",\n                            \"lessThan\": \"6.18.51\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThan\": \"5.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.9\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c\",\n                        \"drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/c2340281be4ddacb8c203e2bce59b126d1d6c4c8","https://git.kernel.org/stable/c/6dceaeceaa7c8396339f3ea34b0110cb912ca61b","https://git.kernel.org/stable/c/47799e1f893d47d8af231710a61065e3ec8a13e8","https://git.kernel.org/stable/c/7e28853c78c20bb8ba4c1dba702430cd05e09f76","https://git.kernel.org/stable/c/9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3","https://git.kernel.org/stable/c/4d7390530853eb7befda9cc786e4c86e8ad7ac9e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89818","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89818","identifiers":["CVE-2026-89818"]},"retained":false,"historicalAffected":[]}],"coverage":[]}