Operation on a Resource after Expiration or Release in Linux kernel - CVE-2026-98398

Vulnerability identifier: #VU155920

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98398

CWE-ID: CWE-672

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a local user to disrupt kernel lock dependency validation.

The vulnerability exists due to insufficient validation of stale lock-class cache entries in the kernel lock dependency validator when acquiring locks whose cached classes have been invalidated. A local user can trigger acquisition of a lock retaining a stale class-cache entry to disrupt kernel lock dependency validation.

The issue can arise after module unloading or lock-key unregistration. Reported behavior includes kernel warnings; reuse of an invalidated class slot can also cause an unrelated lock class to be matched.

Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (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-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
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/02c6be7d675b21d81f0ba3a524346850a8c0e3bf
• https://git.kernel.org/stable/c/1c9d664e2e067fca69e5a41d68e23bbc66a583fe
• https://git.kernel.org/stable/c/6bc345f6d81ebe22e0f355c2a21d7e29691f9332
• https://git.kernel.org/stable/c/baa320fbb2f9fea50f5632a307da8ce84fbef5bd
• https://git.kernel.org/stable/c/c7acfb04c7e2e2dea248282b21373d93296644dd
• https://git.kernel.org/stable/c/f63c86e9d267629758adaba18579e784ddd63c32
• https://git.kernel.org/stable/c/f8a1281ab82df5b51fd0384354d4b21daf2b7af0

• Operation on a Resource after Expiration or Release in Linux kernel locking
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more