CVE-2026-98726

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

nvme-multipath: fix underflow in ANA log bounds checks

The number of ANA groups advertised through Identify Controller sizes the

ANA log buffer. The ANA log header and group descriptors independently

supply the number of groups and namespace IDs to parse.

Both bounds checks subtract an untrusted object size from ana_log_size

before comparing the current offset. If the object is larger than the

buffer, the size_t subtraction underflows and lets the parser read beyond

ana_log_buf.

Check the current offset before the first subtraction and compare each

object size with the remaining buffer instead. This rejects inconsistent

ANA data before dereferencing a truncated group descriptor or walking an

oversized namespace ID array.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References