What’s Vulnerable › Vulnerabilities

CVE-2026-72018: dibs: loopback: validate offset and size in move_data()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: dibs: loopback: validate offset and size in move_data() 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

• Linux kernel: 6.10 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• 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

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