CVE-2026-98201 Affecting linux-6.12 package, versions <6.12.113-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-21434793
- published23 Oct 2026
- disclosed6 Oct 2026
Introduced: 6 Oct 2026
NewCVE-2026-98201 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.113-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-98201
- https://git.kernel.org/stable/c/0d05b43b55d4784a42ce8fb318175f8ad7d9af5a
- https://git.kernel.org/stable/c/6c26681c5668c973bd0e951407d670ac60d9cd66
- https://git.kernel.org/stable/c/b878720e8bcaa4cf7163a5081f904dd6baf11b2c
- https://git.kernel.org/stable/c/c5e573bb095d502be7cbbaa99c26a20984111c6d
- https://git.kernel.org/stable/c/ec174c2ab1abb76b20fa167c6db848c3d97aa838
- https://git.kernel.org/stable/c/ed0406e490f48ed180df140fe2a81be26bccb1a9
- https://git.kernel.org/stable/c/ed0905fda39682d3da7937184397d3276abbffa8
- https://git.kernel.org/stable/c/f84819ef8d66931ee3998fee3c4f03230f4cb6cc