The vulnerability of the sbc_execute_unmap() function in the drivers/target/target_core_sbc.c driver of the TCM kernel of the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the sbcexecuteunmap function in the drivers/target/targetcoresbc.c driver of the Linux operating system’s TCM kernel is related to integer overflow or cyclic shift vulnerabilities. Exploiting this vulnerability could allow an attacker to compromise the confidentiality,...

CVE-2026-53021

A flaw was found in the Linux kernel's SCSI target core. The sbcexecuteunmap function, which handles UNMAP operations, is vulnerable to an integer overflow. This vulnerability occurs because the bounds check for the Logical Block Address LBA and range does not prevent a 64-bit overflow. An attack...

CVE-2026-53021

CVE-2026-53021 affects the Linux kernel SCSI target core (UNMAP bounds check). The root cause is an overflow where LBA + range can wrap on 64-bit overflow, with a fix that adds an overflow check mirroring the pattern used for WRITE_SAME. Publicly noted patches exist across multiple OS families: R...

CVE-2026-53021: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix integer overflow in UNMAP bounds check sbcexecuteunmap checks LBA + range does not exceed the device capacity, but does not guard against LBA + range wrapping around on 64-bit overflow. Add an overflow che...