CVE-2026-98205: Linux kernel · Input: evdev – zero absinfo before partial copy in EVIOCSABS
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: Input: evdev - zero absinfo before partial copy in EVIOCSABS The EVIOCSABS handler copies at most the user supplied ioctl size into an uninitialized on-stack struct input_absinfo: if (copy_from_user(&abs, p, min_t(size_t, size, sizeof(struct input_absinfo)))) The size comes from _IOC_SIZE() of the ioctl command and is therefore fully controlled by userspace. A short size leaves the trailing part of the structure holding whatever was on the kernel stack, and the whole structure is then stored into the device: dev->absinfo[t] = abs; EVIOCGABS hands that back to userspace, disclosing the stale stack bytes. Only the resolution field is currently cleared, which covers the legacy struct layout but not an arbitrarily short size. Zero the structure before the copy so any part not supplied by the caller reads back as zero. The existing resolution fixup is kept, since it also handles a size that partially overlaps that field.
References
- ubuntu.com/security/CVE-2026-98205 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98205 (opens in a new tab)
- git.kernel.org/linus/8b852965b8eaf910c314dc346967ed82c8d4f235 (opens in a new tab)
- git.kernel.org/stable/c/30b853a3d71f16bd0aa66b604bc37dd1254a19b3 (opens in a new tab)
- git.kernel.org/stable/c/3dfe48d5307a1ba22c58231d04257737015569ca (opens in a new tab)
- git.kernel.org/stable/c/71e5619db11dd6429101bd967230d0321ec5ea26 (opens in a new tab)
- git.kernel.org/stable/c/89b6ffa4bc10c436fa9aecc73be105124cd58a35 (opens in a new tab)
- git.kernel.org/stable/c/8b852965b8eaf910c314dc346967ed82c8d4f235 (opens in a new tab)
- git.kernel.org/stable/c/af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b (opens in a new tab)
- git.kernel.org/stable/c/c0aebb57b73c7d06ad21731099afe119b113c403 (opens in a new tab)
- git.kernel.org/stable/c/e834e134a32b6a5c600fa539bb49146f617743ab (opens in a new tab)