Answer in brief
CVE-2026-98201 records a Unknown severity vulnerability in Input: zero ff_effect before compat copy in input_ff_effect_from_user. The current sources do not mark it as known exploited. The current feed maps 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <ed0905fda39682d3da7937184397d3276abbffa8 || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <ec174c2ab1abb76b20fa167c6db848c3d97aa838 || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <6c26681c5668c973bd0e951407d670ac60d9cd66 || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <c5e573bb095d502be7cbbaa99c26a20984111c6d || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <b878720e8bcaa4cf7163a5081f904dd6baf11b2c || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <0d05b43b55d4784a42ce8fb318175f8ad7d9af5a || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <ed0406e490f48ed180df140fe2a81be26bccb1a9 || >=2d56f3a32c0e62f99c043d2579840f9731fe5855 <f84819ef8d66931ee3998fee3c4f03230f4cb6cc | ed0905fda39682d3da7937184397d3276abbffa8, ec174c2ab1abb76b20fa167c6db848c3d97aa838, 6c26681c5668c973bd0e951407d670ac60d9cd66, c5e573bb095d502be7cbbaa99c26a20984111c6d, b878720e8bcaa4cf7163a5081f904dd6baf11b2c, 0d05b43b55d4784a42ce8fb318175f8ad7d9af5a, ed0406e490f48ed180df140fe2a81be26bccb1a9, f84819ef8d66931ee3998fee3c4f03230f4cb6cc |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: Input: zero ff_effect before compat copy in input_ff_effect_from_user In the compat path input_ff_effect_from_user() aliases the caller's native struct ff_effect with the smaller struct ff_effect_compat and copies only the compat sized prefix: compat_effect = (struct ff_effect_compat *)effect; if (copy_from_user(compat_effect, buffer, sizeof(struct ff_effect_compat))) The tail of the native structure is never written. Callers pass an uninitialized on-stack object, for example evdev_do_ioctl() for EVIOCSFF, so those bytes keep their previous stack contents. input_ff_upload() then stores the full native structure in ff->effects[id], from where a uinput based force feedback daemon can read it back via UI_BEGIN_FF_UPLOAD, disclosing kernel stack memory to userspace. Zero the effect before the compat copy.
Quoted source text, attributed separately from HOL analysis.