Bug 2492325 (CVE-2026-53021) - CVE-2026-53021 kernel: scsi: target: core: Fix integer overflow in UNMAP bounds check
Summary: CVE-2026-53021 kernel: scsi: target: core: Fix integer overflow in UNMAP boun...
Keywords:
Status: NEW
Alias: CVE-2026-53021
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 18:05 UTC by OSIDB Bzimport
Modified: 2026-06-26 18:14 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-24 18:05:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: target: core: Fix integer overflow in UNMAP bounds check

sbc_execute_unmap() 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 check matching the pattern already used for WRITE_SAME in
the same file.
Comment 1 Keith Grant 2026-06-26 18:11:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062452-CVE-2026-53021-44ab@gregkh/T
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