CVE-2026-98201
Input: zero ff_effect before compat copy in input_ff_effect_from_user
No known exploitation. EPSS puts it in the 7th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 2d56f3a32c0e62f99c043d2579840f9731fe5855, < ed0905fda39682d3da7937184397d3276abbffa8Upgrade to: ed0905fda39682d3da7937184397d3276abbffa8Affected: ≥ 2d56f3a32c0e62f99c043d2579840f9731fe5855, < ec174c2ab1abb76b20fa167c6db848c3d97aa838Upgrade to: ec174c2ab1abb76b20fa167c6db848c3d97aa838Affected: ≥ 2d56f3a32c0e62f99c043d2579840f9731fe5855, < 6c26681c5668c973bd0e951407d670ac60d9cd66Upgrade to: 6c26681c5668c973bd0e951407d670ac60d9cd66Affected: ≥ 2d56f3a32c0e62f99c043d2579840f9731fe5855, < c5e573bb095d502be7cbbaa99c26a20984111c6dUpgrade to: c5e573bb095d502be7cbbaa99c26a20984111c6d + 4 more branchesStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 7th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
2 events over 0 days, from the signal feeds we watch.
- Publishedrecord updated
Affected products
Sources
References in the record
- git.kernel.org/stable/c/ed0905fda39682d3da7937184397d3276abbffa8
- git.kernel.org/stable/c/ec174c2ab1abb76b20fa167c6db848c3d97aa838
- git.kernel.org/stable/c/6c26681c5668c973bd0e951407d670ac60d9cd66
And 5 more references. See all after sign-in
In the news
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