Answer in brief
CVE-2026-98677 records a Unknown severity vulnerability in iio: adc: ad_sigma_delta: fix use-after-free on unbind. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <84500ae0d976995a6870cb1dca2d124b6b2d6e5a || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <f20b94a7dc1ff9ade191ce839c984210fdbdc653 || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <5663c72bf400231e90777982216797191887a6b9 || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <9ee8306121495d2a25aa5d1bfd519f2748786b83 | 84500ae0d976995a6870cb1dca2d124b6b2d6e5a, f20b94a7dc1ff9ade191ce839c984210fdbdc653, 5663c72bf400231e90777982216797191887a6b9, 9ee8306121495d2a25aa5d1bfd519f2748786b83 |
| Linux/Linuxgeneric | 5.19 | Not reported |
| Linux/Linuxgeneric | >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <975b09bc680acc60903777b766cdb53b0bf9c9f6 || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <84500ae0d976995a6870cb1dca2d124b6b2d6e5a || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <f20b94a7dc1ff9ade191ce839c984210fdbdc653 || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <5663c72bf400231e90777982216797191887a6b9 || >=8bea9af887de4c99a95f93f2ce400ef63e8b4e9b <9ee8306121495d2a25aa5d1bfd519f2748786b83 | 975b09bc680acc60903777b766cdb53b0bf9c9f6, 84500ae0d976995a6870cb1dca2d124b6b2d6e5a, f20b94a7dc1ff9ade191ce839c984210fdbdc653, 5663c72bf400231e90777982216797191887a6b9, 9ee8306121495d2a25aa5d1bfd519f2748786b83 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad_sigma_delta: fix use-after-free on unbind ad_sd_buffer_postenable() allocates sigma_delta->samples_buf with devm_krealloc() at runtime, so its devres entry sits after all probe-time entries of the driver. devm resources are released in reverse allocation order, which means unbind frees samples_buf before iio_device_unregister() disables the buffers and detaches the trigger pollfunc. The data ready IRQ is still enabled at that point, so ad_sd_trigger_handler() can still run and memcpy() incoming samples into the freed samples_buf. Fix this by preallocating the buffer in devm_ad_sd_setup_buffer_and_trigger(), before the triggered buffer and the IRQ are set up, so it is freed only after iio_device_unregister() has drained the trigger handler via free_irq(). Size it for the worst case of all sequencer slots being active; ad_sd_validate_scan_mask() already caps the number of active channels at num_slots. This issue was found by an in-house static analysis tool.
Quoted source text, attributed separately from HOL analysis.