{"id":"CVE-2026-98951","revision":"17784d93ad9a4a549cc56c9187e87f30","records":[{"revision":"17784d93ad9a4a549cc56c9187e87f30","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-98951","aliases":[],"title":"riscv: ptrace: Zero-initialize regset buffers before copyin","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: ptrace: Zero-initialize regset buffers before copyin\n\nuser_regset_copyin() only copies `count` bytes, so a PTRACE_SETREGSET\nrequest with a short iov_len leaves the rest of the stack buffer\nuninitialized. In riscv_vr_set() that garbage is validated and copied\ninto the target's vstate, and in riscv_cfi_set() it can be stored as\nthe target's shadow stack pointer. Zero both buffers, as the get path\nalready does.","state":0,"publishedAt":"2026-10-23T12:19:10.747+00:00","modifiedAt":"2026-10-23T12:19:10.747+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                        \"arch/riscv/kernel/ptrace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9300f00439743c4a34d735e1a27118eb68a1504e\",\n                            \"lessThan\": \"89fc70d73f4ac8781f9e15edd1dbc6b6088453b3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9300f00439743c4a34d735e1a27118eb68a1504e\",\n                            \"lessThan\": \"59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f2a9cd050901c4734bc175294c3bd6a40a1a9e99\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.5.3\",\n                            \"lessThan\": \"6.6\",\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                        \"arch/riscv/kernel/ptrace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\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":[],"references":["https://git.kernel.org/stable/c/89fc70d73f4ac8781f9e15edd1dbc6b6088453b3","https://git.kernel.org/stable/c/59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98951","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98951","identifiers":["CVE-2026-98951"]},"retained":false,"historicalAffected":[]}],"coverage":[]}