Use-after-free in Linux kernel - CVE-2026-98378
Published: October 9, 2026
Vulnerability identifier: #VU154051
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98378
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the BPF link iterator when iterating over unsettled links during link creation. A local user can trigger concurrent BPF link creation and iteration to cause a denial of service.
Exploitation requires anon_inode_getfile() to fail after the iterator acquires a reference to the unsettled link. The reported kernel panic occurred with KASAN panic_on_warn enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-98378
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/50e80e2bb5e2be8515205b9c496b9640ddefa434
- https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8
- https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f
- https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2
- https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573
- https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f