NVMe service interruption via unsigned NUMA index
Published Aug 15, 2026 · Updated Aug 15, 2026
Out-of-bounds access in Linux 6.16 through 6.18.39 and 6.19 through 7.1.4 causes NVMe namespace setup to fault during probing. nvme_setup_descriptor_pools() receives NUMA_NO_NODE (-1) from nvme_init_hctx_common(), converts it through an unsigned parameter to UINT_MAX, and uses that value to index dev->descriptor_pools[] beyond its nr_node_ids-sized boundary. The fault occurs when an NVMe controller is probed by a kernel built with CONFIG_NUMA=n, leaving the namespace without a /dev node.
Summary
What happened
Out-of-bounds access in Linux 6.16 through 6.18.39 and 6.19 through 7.1.4 causes NVMe namespace setup to fault during probing. nvme_setup_descriptor_pools() receives NUMA_NO_NODE (-1) from nvme_init_hctx_common(), converts it through an unsigned parameter to UINT_MAX, and uses that value to index dev->descriptor_pools[] beyond its nr_node_ids-sized boundary. The fault occurs when an NVMe controller is probed by a kernel built with CONFIG_NUMA=n, leaving the namespace without a /dev node.
The record
- CVE
- CVE-2026-74383
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=6.16
- Affected versionversion=d977506f8863807129d7a11f4057dfb1b38085ea <3e8aed5edaeeb237f97255d711aac6b5843fc059
- Affected versionversion=d977506f8863807129d7a11f4057dfb1b38085ea <a192b8cfa447e1b3701a13434a31c392b2e7ed29
- Affected versionversion=d977506f8863807129d7a11f4057dfb1b38085ea <fa9b6accd1ad7af6914b409c6b003c417724c299
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