UBUNTU-CVE-2026-98727: Medium severity ubuntu/linux-hwe-edge vulnerability
In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: set BLKFEATZONED only after the zone info is known The namespace head is marked zoned at allocation time based only on the command set identifier. If the zone info query reports a zero zone size, the path namespace is registered without zoned limits while the head still advertises the zoned capability with a zone size of zero, and reporting zones or writing to the head then shifts by ilog2(0). Drop the zoned feature from the head allocation and let the head limits refresh stack it in from the path namespace instead.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Do not set BLK_FEAT_ZONED when allocating the namespace head; let the head limits refresh derive and add the zoned feature from the path namespace after zone information is known.
Linux kernel nvme-multipath namespace head BLK_FEAT_ZONED = disabled at allocation until zone information is known