The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade kernelUpgrade kernel-debugUpgrade python-perfUpgrade kernel-firmwareUpgrade kernel-debug-develUpgrade kernel-headersUpgrade kernel-develUpgrade kernel-docUpgrade kernel-abi-whitelistsUpgrade perf | Dec 1, 2016 | Feb 28, 2014 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 28, 2014 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jan 17, 2014 |
| Ubuntu | — | Upgrade linux-image-3.11.0-18-genericUpgrade linux-image-3.11.0-18-generic-lpae | Nov 8, 2024 | Feb 28, 2014 |
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