CVE-2026-89598: Linux kernel · fbdev: ssd1307fb: defer I2C transfers from damage callbacks
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 11 Sep 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 has been implemented in the Linux kernel to defer I2C transfers from framebuffer damage callbacks, preventing sleeping in atomic context. Users should update their Linux kernel to a version that includes this fix. Patch status is not explicitly stated in the provided data; therefore, users should consult the vendor or Linux kernel advisory for the exact fixed versions and update accordingly.
Description
A vulnerability in the Linux kernel's fbdev driver for ssd1307fb has been resolved. The issue involved synchronous I2C transfers occurring in atomic context during framebuffer damage callbacks, which can lead to scheduling while atomic and kernel warnings or crashes. This was observed on RK3566 systems and involved the watchdog failing to stop properly. The vulnerability has been fixed by deferring I2C transfers from damage callbacks to avoid sleeping in atomic context.
References
- nvd.nist.gov/vuln/detail/CVE-2026-89598 (opens in a new tab)
- git.kernel.org/stable/c/1981e54ac137f773fb25a7209a42b75213868306 (opens in a new tab)
- git.kernel.org/stable/c/3bcab9b21f71d52bd1b2e03b80f29516bb000593 (opens in a new tab)
- git.kernel.org/stable/c/9ad709afdfa32509ed64938a6d9cd00db3cd54c2 (opens in a new tab)
- git.kernel.org/stable/c/b64f3497a0cd7bbd26d6c268eebd217d8062fcee (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89598.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)
- ubuntu.com/security/CVE-2026-89598 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-89598 (opens in a new tab)
- git.kernel.org/linus/9ad709afdfa32509ed64938a6d9cd00db3cd54c2 (opens in a new tab)