CVE-2026-98917: Linux kernel · parisc: Increase kernel stack size to 32kb
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 02:28 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 23 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.
AI-suggested
A fix is available by applying the kernel update that increases the kernel stack size to 32 KB for 64-bit parisc Linux kernels. Users should upgrade to a patched kernel version that includes this change to prevent kernel crashes caused by stack overflow.
Description
A vulnerability in the Linux kernel on the parisc architecture has been addressed by increasing the kernel stack size to 32 KB for 64-bit kernels. This change prevents kernel crashes caused by stack overflows, which were observed during specific workloads such as building the Debian vtk9 package with gcc 17. The issue could lead to kernel panics triggered by low stack detection in interrupt handlers.
References
- ubuntu.com/security/CVE-2026-98917 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98917 (opens in a new tab)
- git.kernel.org/stable/c/5023c70853ad9829c53d8e9def5ee969b4e1b931 (opens in a new tab)
- git.kernel.org/stable/c/94b7e3a7e871ae27d4935c76959dfc61829f27f9 (opens in a new tab)
- git.kernel.org/stable/c/db45f02b7a5f753efc9003f616dfb5ee4cb6d077 (opens in a new tab)