Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-46089
Published: May 27, 2026
Vulnerability identifier: #VU132399
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-46089
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of partial discard requests in zram when processing discard operations. A local user can issue a partial discard request to cause a denial of service.
The issue can cause the calling process to sleep indefinitely in submit_bio_wait().
How to mitigate CVE-2026-46089
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975
- https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df
- https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194
- https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85
- https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003