CVE-2026-98917 parisc: Increase kernel stack size to 32kb
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-98917?
CVE-2026-98917 is a vulnerability in Linux, published on 23 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
parisc: Increase kernel stack size to 32kb
For 64-bit Linux kernels, increase the default kernel stack size (THREAD_SIZE_ORDER) to 32 kB, in order to avoid kernel crashes which have been triggered recently when building the debian vtk9 package with gcc 17:
stackcheck: kworker/u128:0 will most likely overflow kernel stack (sp:179a83af0, stk bottom-top:179a80000-179a84000) Kernel panic - not syncing: low stack detected by irq handler - check messages CPU: 2 UID: 0 PID: 30760 Comm: kworker/u128:0 Tainted: G W 6.18.46-dirty #1 NONE Tainted: [W]=WARN Hardware name: 9000/800/rp3440 Workqueue: writeback wb_workfn (flush-259:0) Backtrace: [<000000004022f050>] show_stack+0x70/0x90 [<000000004022378c>] dump_stack_lvl+0x124/0x190 [<000000004022382c>] dump_stack+0x34/0x48 [<000000004020212c>] vpanic+0x204/0x648 [<00000000402025c4>] panic+0x54/0x58 [<0000000040232230>] do_cpu_irq_mask+0x3f8/0x440 [<0000000040227070>] intr_return+0x0/0xc
Which versions are affected by CVE-2026-98917?
How do I fix CVE-2026-98917?
Upgrade to a fixed version.
Is CVE-2026-98917 being exploited?
There is no known exploitation of CVE-2026-98917 in the wild and no public exploit code.
Sources
Also known as AZL-110699, BELL-CVE-2026-98917, DEBIAN-CVE-2026-98917, GHSA-2c7p-wf48-2qwx, UBUNTU-CVE-2026-98917.