Local service interruption via locked writeback folio
Published Aug 15, 2026 · Updated Aug 15, 2026
Denial of service in Linux kernel netfs allows local users to make the system unresponsive during low-memory writeback. In fs/netfs/write_issue.c, an ENOMEM exit from netfs_writepages leaves the current folio clean and locked before the terminal writeback_iter() call instead of redirtying and unlocking it. Exploitation requires local low-privileged access, memory pressure, and writeback through netfs; published scoring limits impact to reduced availability without confidentiality or integrity loss.
Summary
What happened
Denial of service in Linux kernel netfs allows local users to make the system unresponsive during low-memory writeback. In fs/netfs/write_issue.c, an ENOMEM exit from netfs_writepages leaves the current folio clean and locked before the terminal writeback_iter() call instead of redirtying and unlocking it. Exploitation requires local low-privileged access, memory pressure, and writeback through netfs; published scoring limits impact to reduced availability without confidentiality or integrity loss.
The record
- CVE
- CVE-2026-72363
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-413, T1499
- Attack vector
- local
- Privileges
- authenticated
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=06fa229ceb36898e68022b5654c017d2c6582d7d <1a4421c7a5611db554328f721a4f7642440b44bd
- Affected versionversion=06fa229ceb36898e68022b5654c017d2c6582d7d <a9b89752c2726e88ea67994fb97a0316b24d30b7
- Affected versionversion=06fa229ceb36898e68022b5654c017d2c6582d7d <b6a713fd34b9498ee2164d5d3e8460732a392efc
- Affected versionversion=6.14
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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