CVE-2026-98121: Linux kernel · watchdog: msc313e: Fix NULL pointer dereference in PM callbacks
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 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 is available that sets the platform device driver data in the msc313e_wdt_probe() function. Users should apply the updated Linux kernel versions that include this patch to mitigate the issue.
Description
A vulnerability in the Linux kernel watchdog driver for msc313e causes a NULL pointer dereference in power management callbacks due to missing driver data initialization. This issue has been resolved by setting the platform device driver data in the probe function.
References
- ubuntu.com/security/CVE-2026-98121 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98121 (opens in a new tab)
- git.kernel.org/stable/c/b02f902fe4b59d65f74a25c4523a75453bd3f808 (opens in a new tab)
- git.kernel.org/stable/c/744b25040d8206f7925b8ba0be5edf93fa4bf81e (opens in a new tab)
- git.kernel.org/stable/c/6495dc16e635356fd2b7535dcbf9b6779de4e753 (opens in a new tab)
- git.kernel.org/stable/c/e3eceb76515910746e6268c4e4ac1c07516ebd7b (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98121 (opens in a new tab)
- git.kernel.org/stable/c/960251cc4a413d8f1eef2a2c6aca41073b57ce16 (opens in a new tab)
- git.kernel.org/stable/c/a135415be56839e555e0bcdd5ffb8d2f5f947bd7 (opens in a new tab)
- git.kernel.org/stable/c/afc3ea51e479289a23c642cc8bade67b94225ed9 (opens in a new tab)