Resource exhaustion in Linux kernel - CVE-2026-98917

Vulnerability identifier: #VU157586

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98917

CWE-ID: CWE-400

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service by triggering a kernel panic.

The vulnerability exists due to insufficient kernel stack allocation in the 64-bit PA-RISC kernel stack configuration when processing workloads that exhaust the available stack. A local user can run a build workload that triggers kernel stack exhaustion to cause a denial of service.

The undersized stack configuration applies when CONFIG_IRQSTACKS is enabled.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/5023c70853ad9829c53d8e9def5ee969b4e1b931
• https://git.kernel.org/stable/c/94b7e3a7e871ae27d4935c76959dfc61829f27f9
• https://git.kernel.org/stable/c/db45f02b7a5f753efc9003f616dfb5ee4cb6d077

• Resource exhaustion in Linux kernel include asm
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more