{"id":"CVE-2026-74404","revision":"4ec8ca93d6374fb292bcbb29a08fc643","records":[{"revision":"4ec8ca93d6374fb292bcbb29a08fc643","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74404","aliases":[],"title":"crypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one\n\nSashiko notes:\n\n> regarding the bounds check in snp_filter_reserved_mem_regions()\n> called via walk_iomem_res_desc(): does the check\n> if ((range_list->num_elements * 16 + 8) > PAGE_SIZE)\n> allow an off-by-one heap buffer overflow?\n>\n> If range_list->num_elements is 255, 255 * 16 + 8 = 4088, which is <= 4096.\n> Writing range->base (8 bytes) fills 4088-4095, but writing range->page_count\n> (4 bytes) would write to 4096-4099, overflowing the kzalloc-allocated\n> PAGE_SIZE buffer.\n\nFix this by accounting for the entry about to be written to, in addition to\nthe entries that are already allocated.","state":0,"publishedAt":"2026-08-15T05:59:14.073+00:00","modifiedAt":"2026-10-16T19:05:43.034+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/crypto/ccp/sev-dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2\",\n                            \"lessThan\": \"830c1f3e71989448652973375ef5e39b6ede47a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2\",\n                            \"lessThan\": \"c5c79d92da0f9a09f48be5e2aabed2d6d1a96294\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2\",\n                            \"lessThan\": \"af7341616b742ad2c374a90998bd650a035f694d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2\",\n                            \"lessThan\": \"1b864b6cb213bbd7b406e9b2e98c962077f300df\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/crypto/ccp/sev-dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\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:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/830c1f3e71989448652973375ef5e39b6ede47a3","https://git.kernel.org/stable/c/c5c79d92da0f9a09f48be5e2aabed2d6d1a96294","https://git.kernel.org/stable/c/af7341616b742ad2c374a90998bd650a035f694d","https://git.kernel.org/stable/c/1b864b6cb213bbd7b406e9b2e98c962077f300df"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74404","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74404","identifiers":["CVE-2026-74404"]},"retained":false,"historicalAffected":[]}],"coverage":[]}