Kernel crash via off-by-one FDP index
Published Aug 15, 2026 · Updated Aug 15, 2026
Out-of-bounds read in Linux kernel 6.16 allows attackers to crash a host through attacker-supplied NVMe FDP metadata. The NVMe namespace-scan path sets its upper bound to NUMFDPC + 1 but rejects only greater values, so an equal fdpcidx advances past the FDP descriptor array. Exposure requires an FDP-capable NVMe device or an already configured NVMe-oF endpoint under attacker control; the bounded consequence is a kernel crash from the invalid read.
Summary
What happened
Out-of-bounds read in Linux kernel 6.16 allows attackers to crash a host through attacker-supplied NVMe FDP metadata. The NVMe namespace-scan path sets its upper bound to NUMFDPC + 1 but rejects only greater values, so an equal fdpcidx advances past the FDP descriptor array. Exposure requires an FDP-capable NVMe device or an already configured NVMe-oF endpoint under attacker control; the bounded consequence is a kernel crash from the invalid read.
The record
- CVE
- CVE-2026-74361
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-125, T1499
- Attack vector
- Unavailable
- Privileges
- Unavailable
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
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=30b5f20bb2ddab013035399e5c7e6577da49320a <0967074f6830718fd2597404ef119bddd0dbfd00
- Affected versionversion=30b5f20bb2ddab013035399e5c7e6577da49320a <5d0e7d2af884b91329235abb16652ae4eead8079
- Affected versionversion=30b5f20bb2ddab013035399e5c7e6577da49320a <5e406928404d67a8da8aa3ae21732e1ea1a04118
- Affected versionversion=6.16
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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