Service interruption via failed TTM buffer backup
Published Jun 24, 2026 · Updated Jun 24, 2026
Infinite-loop denial of service in Linux Kernel 6.15 through 7.0.9 allows local users to interrupt the system through DRM TTM memory pressure. The ttm_bo_shrink() path removes a buffer resource from the bulk-move LRU before backup succeeds, so a failed backup leaves traversal state that repeatedly revisits the resource. Exploitation requires local low-privilege access and a backup failure during buffer shrinking; the bounded consequence is availability loss rather than data access or modification.
Summary
What happened
Infinite-loop denial of service in Linux Kernel 6.15 through 7.0.9 allows local users to interrupt the system through DRM TTM memory pressure. The ttm_bo_shrink() path removes a buffer resource from the bulk-move LRU before backup succeeds, so a failed backup leaves traversal state that repeatedly revisits the resource. Exploitation requires local low-privilege access and a backup failure during buffer shrinking; the bounded consequence is availability loss rather than data access or modification.
The record
- CVE
- CVE-2026-52949
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 24, 2026CVE publishedPublication date reported by the CVE source.
- Jun 24, 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=70d645deac98303d1bf9ab08a4e68da52bf8c1e1 <1d59f36e95f7f7134db0e313c9d787cb0adb2153
- Affected versionversion=70d645deac98303d1bf9ab08a4e68da52bf8c1e1 <9402ad98a047dd9894ec868a7df5ad9bd03327d3
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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