{"schema":"threatline.record/2","record":{"id":"CVE-2026-98951","aliases":[],"summary":"riscv: ptrace: Zero-initialize regset buffers before copyin","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","source_modified_at":"2026-10-23T12:19:10.747Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"9300f00439743c4a34d735e1a27118eb68a1504e","lessThan":"89fc70d73f4ac8781f9e15edd1dbc6b6088453b3","status":"affected","versionType":"git"},{"version":"9300f00439743c4a34d735e1a27118eb68a1504e","lessThan":"59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97","status":"affected","versionType":"git"},{"version":"f2a9cd050901c4734bc175294c3bd6a40a1a9e99","status":"affected","versionType":"git"},{"version":"6.5.3","lessThan":"6.6","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","source_modified_at":"2026-10-23T12:19:10.747Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","source_modified_at":"2026-10-23T12:19:10.747Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"89fc70d73f4ac8781f9e15edd1dbc6b6088453b3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","source_modified_at":"2026-10-23T12:19:10.747Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","source_modified_at":"2026-10-23T12:19:10.747Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"6.6","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:19:10.747Z","modified_at":"2026-10-23T12:19:10.747Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98951","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:19:10.747Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/89fc70d73f4ac8781f9e15edd1dbc6b6088453b3"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T12:19:10.747Z","content_hash":"3e70509721afdc92a6248b9caaabc05a13398891d55741c2911479c8fad52070"}}