System crash via zero cold-memory quota target
Published Aug 22, 2026 · Updated Aug 22, 2026
Divide by zero in Linux kernel 7.0 DAMON_LRU_SORT allows local users with module-parameter write access to crash the system. The cold-memory scheme computes its quota target as 10000 minus active_mem_bp plus 2, so an input of 10002 passes a zero target to damos_quota_score(). Exploitation requires write permission to the module parameters and enabling the nondefault feature; the resulting kernel oops interrupts the system.
Summary
What happened
Divide by zero in Linux kernel 7.0 DAMON_LRU_SORT allows local users with module-parameter write access to crash the system. The cold-memory scheme computes its quota target as 10000 minus active_mem_bp plus 2, so an input of 10002 passes a zero target to damos_quota_score(). Exploitation requires write permission to the module parameters and enabling the nondefault feature; the resulting kernel oops interrupts the system.
The record
- CVE
- CVE-2026-74645
- Published
- Aug 22, 2026
- Updated
- Aug 22, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-369, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 22, 2026CVE publishedPublication date reported by the CVE source.
- Aug 22, 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=40d98d31cd7060228e03303c5c34ae7101020416 <06befa61c427e74319781e6f35a364cfc32dbae8
- Affected versionversion=40d98d31cd7060228e03303c5c34ae7101020416 <e7e5e5e0dfe2ea171044c24c263efae4ee882b3f
- Affected versionversion=7.0
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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