CVE-2026-80568: Linux kernel · Input: synaptics-rmi4 – block s_input when F54 queue is busy
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 26 Aug 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.
AI-suggested
A fix is available that blocks the VIDIOC_S_INPUT ioctl call with an -EBUSY error when the V4L2 queue is busy streaming, preventing mid-stream input changes that cause the overflow. Users should apply the official Linux kernel updates that include this fix. Since this is a kernel-level vulnerability, updating to a patched kernel version is the recommended remediation. No additional mitigations are specified.
Description
In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - block s_input when F54 queue is busy Changing the input (diagnostic report type) mid-stream changes the report size. Since V4L2 buffers are allocated based on the size at stream start, changing the input while streaming could lead to a heap buffer overflow if the new size is larger than the allocated buffers. Prevent this by blocking VIDIOC_S_INPUT with -EBUSY if the V4L2 queue is busy (streaming).
References
- nvd.nist.gov/vuln/detail/CVE-2026-80568 (opens in a new tab)
- git.kernel.org/stable/c/1d718f1461766e9f00a8dbeb4f13f1b1c19d90ac (opens in a new tab)
- git.kernel.org/stable/c/493ba8e794729649689438edba72337111303cc4 (opens in a new tab)
- git.kernel.org/stable/c/7e994a9ecc0b49ad2fe63da9c92a8aca8a6614af (opens in a new tab)
- git.kernel.org/stable/c/cae79513f9115c350561b16f36adcb47c9bfff12 (opens in a new tab)
- git.kernel.org/stable/c/ddd9a53faf3b65e5920cb802cb1db6f4615bdfef (opens in a new tab)
- git.kernel.org/stable/c/fa69f93015becf3729716de2199b58540aa99672 (opens in a new tab)
- git.kernel.org/stable/c/fbfd76746adc16d64be29ff113f673b70bc3f5c2 (opens in a new tab)
- git.kernel.org/stable/c/ff0849705d29277fd1f6fc6596674b9308724fb2 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80568 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80568 (opens in a new tab)