dibs: loopback: validate offset and size in move_data()
Published Aug 15, 2026
7.8
HIGHCVSS 3.1
EPSS 0.18%
Description
The loopback move_data() performs a memcpy into the registered DMB without checking whether offset + size exceeds the DMB length. Unlike real ISM hardware, which enforces memory region bounds natively, the software loopback has no such protection.
A peer-supplied out-of-bounds offset or oversized write would result in an OOB write past the allocated kernel buffer. Add an explicit bounds check before the memcpy to reject such requests with -EINVAL.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.10StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.10
- Version 6.12.97StatusunaffectedConstraints<=6.12.*
- Version 6.18.40StatusunaffectedConstraints<=6.18.*
- Version 7.1.5StatusunaffectedConstraints<=7.1.*
- Version 7.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (9)
- https://access.redhat.com/security/cve/CVE-2026-72018 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2516386 Issue Tracking
- https://git.kernel.org/stable/c/78237e3c0720fcc6eb9b87e90fd70f63eeca886f
- https://git.kernel.org/stable/c/94fe0ab01b480b52bd8f977edbd845ef375d69fd
- https://git.kernel.org/stable/c/b2f426a9a22886071966432ede8fceafffe12b8c
- https://git.kernel.org/stable/c/ee188a6b264b71315a67f1b9470faad308b730d2
- https://lore.kernel.org/linux-cve-announce/2026081509-CVE-2026-72018-ba3f@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-72018
- https://www.cve.org/CVERecord?id=CVE-2026-72018
Change history (0)
No recorded changes yet.