DMA mapping leak via NVMe data setup errors
Published Jul 19, 2026 · Updated Jul 19, 2026
DMA mapping resource leakage in the Linux kernel 6.17 allows attackers to cause an unspecified impact through NVMe PCI data setup errors. In drivers/nvme/host/pci.c, PRP and SGL setup leaves the initial DMA iterator mapping active when tracking-descriptor allocation fails; invalid bio_vec detection also returns without unmapping it. The published record identifies data-setup error paths as the gate but does not specify who can induce them or whether the leaked mappings cause exhaustion, interruption, or another security impact.
Summary
What happened
DMA mapping resource leakage in the Linux kernel 6.17 allows attackers to cause an unspecified impact through NVMe PCI data setup errors. In drivers/nvme/host/pci.c, PRP and SGL setup leaves the initial DMA iterator mapping active when tracking-descriptor allocation fails; invalid bio_vec detection also returns without unmapping it. The published record identifies data-setup error paths as the gate but does not specify who can induce them or whether the leaked mappings cause exhaustion, interruption, or another security impact.
The record
- CVE
- CVE-2026-64019
- Published
- Jul 19, 2026
- Updated
- Jul 19, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Jul 19, 2026CVE publishedPublication date reported by the CVE source.
- Jul 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.17
- Affected versionversion=7ce3c1dd78fca86ea8b9aee370db10c7a8cfc3c2 <1bf86336e4b6cf40873fda47a7fe191446864937
- Affected versionversion=7ce3c1dd78fca86ea8b9aee370db10c7a8cfc3c2 <e50db059ec8e63bc50b1cc039e2502cb5ea75a70
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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