Local service interruption via oversized iommufd queues
Published Jul 25, 2026 · Updated Jul 25, 2026
Resource exhaustion in Linux Kernel 6.15 through 6.18.39 and 6.19 through 7.1.3 allows local users to interrupt service via iommufd. The vevent queue allocator accepts a user-controlled depth and allocates the resulting large queue while holding a spinlock, consuming atomic memory reserves. A low-privileged local user with iommufd access can create oversized queues until kernel memory pressure disrupts system availability; no data disclosure or modification is reported.
Summary
What happened
Resource exhaustion in Linux Kernel 6.15 through 6.18.39 and 6.19 through 7.1.3 allows local users to interrupt service via iommufd. The vevent queue allocator accepts a user-controlled depth and allocates the resulting large queue while holding a spinlock, consuming atomic memory reserves. A low-privileged local user with iommufd access can create oversized queues until kernel memory pressure disrupts system availability; no data disclosure or modification is reported.
The record
- CVE
- CVE-2026-64292
- Published
- Jul 25, 2026
- Updated
- Jul 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-401, T1499.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2026CVE publishedPublication date reported by the CVE source.
- Jul 25, 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=6.15
- Affected versionversion=e36ba5ab808ef6237c3148d469c8238674230e2b <47443565d10c51366c9382dbc8597cd6c460b8a2
- Affected versionversion=e36ba5ab808ef6237c3148d469c8238674230e2b <6c5fc40200cd0a87d66a368eee00df4d1cca946e
- Affected versionversion=e36ba5ab808ef6237c3148d469c8238674230e2b <779480ea79551c31964e74b9aef0e730faa3aa11
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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