In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential deadlock in write-through mode Fix… (CVE-2026-64062)
A vulnerability in the Linux kernel's netfs subsystem involving a potential deadlock in write-through mode has been resolved. The issue was due to improper handling in netfs_advance_writethrough(), which could cause a deadlock by premature writeback during folio processing. The fix ensures the folio is always unlocked and marked dirty appropriately, preventing deadlocks related to mmapped reads and writes. The vulnerability does not have a CVSS score or known exploits in the wild.
AI Analysis
Technical Summary
The Linux kernel netfs subsystem contained a potential deadlock vulnerability in write-through mode caused by netfs_advance_writethrough() not unlocking the supplied folio or marking it dirty correctly if the folio was not written to the end. Premature writeback was prevented by locks held by the caller, but the improper handling could still lead to deadlocks involving mmapped reads and writes. The fix ensures the folio is unlocked and marked dirty, avoiding deadlocks during concurrent operations.
Potential Impact
This vulnerability could cause a deadlock in the Linux kernel when using netfs in write-through mode, potentially affecting system stability and availability during file operations involving memory-mapped reads and writes. There are no known exploits in the wild.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should update to the fixed kernel version once it is available. Patch status is not explicitly confirmed in the provided data; therefore, check the official Linux kernel advisories for the exact fixed versions and apply updates accordingly.
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential deadlock in write-through mode Fix… (CVE-2026-64062)
Description
A vulnerability in the Linux kernel's netfs subsystem involving a potential deadlock in write-through mode has been resolved. The issue was due to improper handling in netfs_advance_writethrough(), which could cause a deadlock by premature writeback during folio processing. The fix ensures the folio is always unlocked and marked dirty appropriately, preventing deadlocks related to mmapped reads and writes. The vulnerability does not have a CVSS score or known exploits in the wild.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel netfs subsystem contained a potential deadlock vulnerability in write-through mode caused by netfs_advance_writethrough() not unlocking the supplied folio or marking it dirty correctly if the folio was not written to the end. Premature writeback was prevented by locks held by the caller, but the improper handling could still lead to deadlocks involving mmapped reads and writes. The fix ensures the folio is unlocked and marked dirty, avoiding deadlocks during concurrent operations.
Potential Impact
This vulnerability could cause a deadlock in the Linux kernel when using netfs in write-through mode, potentially affecting system stability and availability during file operations involving memory-mapped reads and writes. There are no known exploits in the wild.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should update to the fixed kernel version once it is available. Patch status is not explicitly confirmed in the provided data; therefore, check the official Linux kernel advisories for the exact fixed versions and apply updates accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pw37-pjm5-88jp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64062"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a92a4a8d598912bf1c
Added to database: 07/19/2026, 19:38:17 UTC
Last enriched: 07/19/2026, 19:51:31 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 13
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