{"schema":"threatline.record/2","record":{"id":"CVE-2026-98677","aliases":[],"summary":"iio: adc: ad_sigma_delta: fix use-after-free on unbind","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad_sigma_delta: fix use-after-free on unbind\n\nad_sd_buffer_postenable() allocates sigma_delta->samples_buf with\ndevm_krealloc() at runtime, so its devres entry sits after all\nprobe-time entries of the driver. devm resources are released in\nreverse allocation order, which means unbind frees samples_buf before\niio_device_unregister() disables the buffers and detaches the trigger\npollfunc. The data ready IRQ is still enabled at that point, so\nad_sd_trigger_handler() can still run and memcpy() incoming samples\ninto the freed samples_buf.\n\nFix this by preallocating the buffer in\ndevm_ad_sd_setup_buffer_and_trigger(), before the triggered buffer and\nthe IRQ are set up, so it is freed only after iio_device_unregister()\nhas drained the trigger handler via free_irq(). Size it for the worst\ncase of all sequencer slots being active; ad_sd_validate_scan_mask()\nalready caps the number of active channels at num_slots.\n\nThis issue was found by an in-house static analysis tool.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"8bea9af887de4c99a95f93f2ce400ef63e8b4e9b","lessThan":"975b09bc680acc60903777b766cdb53b0bf9c9f6","status":"affected","versionType":"git"},{"version":"8bea9af887de4c99a95f93f2ce400ef63e8b4e9b","lessThan":"84500ae0d976995a6870cb1dca2d124b6b2d6e5a","status":"affected","versionType":"git"},{"version":"8bea9af887de4c99a95f93f2ce400ef63e8b4e9b","lessThan":"f20b94a7dc1ff9ade191ce839c984210fdbdc653","status":"affected","versionType":"git"},{"version":"8bea9af887de4c99a95f93f2ce400ef63e8b4e9b","lessThan":"5663c72bf400231e90777982216797191887a6b9","status":"affected","versionType":"git"},{"version":"8bea9af887de4c99a95f93f2ce400ef63e8b4e9b","lessThan":"9ee8306121495d2a25aa5d1bfd519f2748786b83","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","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-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"975b09bc680acc60903777b766cdb53b0bf9c9f6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"84500ae0d976995a6870cb1dca2d124b6b2d6e5a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5663c72bf400231e90777982216797191887a6b9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","source_modified_at":"2026-10-21T12:55:38.016Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9ee8306121495d2a25aa5d1bfd519f2748786b83","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.002,"percentile":0.09315,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:45:33.871Z","modified_at":"2026-10-21T12:55:38.016Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98677","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:55:38.016Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98677","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/975b09bc680acc60903777b766cdb53b0bf9c9f6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/84500ae0d976995a6870cb1dca2d124b6b2d6e5a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f20b94a7dc1ff9ade191ce839c984210fdbdc653"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5663c72bf400231e90777982216797191887a6b9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9ee8306121495d2a25aa5d1bfd519f2748786b83"}],"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":"2026-10-21T12:55:38.016Z","content_hash":"c2e1c934425f3674261a687fb4dadd6eee2b958ca1edad366cefc7aff0aa956c"}}