cve 2026 27456

CVE-2026-27456 is a TOCTOU (time-of-check time-of-use) race condition vulnerability in the util-linux mount command, specifically during loop device setup. The flaw affects systems using mount(8) and can be exploited under specific environmental conditions that an attacker must first establish. Discussions on WindowsForum cover the technical details of the race condition, the role of loop devices, and Microsoft's assessment that exploitation is not purely opportunistic but requires the attacker to shape timing or trust relationships. The tag provides a focused resource for IT professionals and security researchers tracking this Linux kernel utility vulnerability and its implications for system integrity.