CVE-2026-80898
Received Received - Intake

Memory Corruption in Linux Kernel

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: netfs: clear PG_private_2 on copy-to-cache append failure netfs_pgpriv2_copy_to_cache() marks the folio with PG_private_2 before netfs_pgpriv2_copy_folio() appends it to the copy-to-cache rolling buffer. If the append fails, the folio is not queued for cache writeback, so the PG_private_2 state and its reference must be released immediately.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-80898
EUVD
EUVD-2026-71648

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a failure to clear the PG_private_2 flag on a folio when a copy-to-cache append operation fails. The flag is set before attempting to append the folio to a rolling buffer, but if the append fails, the folio is not queued for cache writeback. This leaves the PG_private_2 state and its reference uncleared, potentially causing memory management issues.

Detection Guidance

This vulnerability is specific to the Linux kernel's netfs subsystem and may not have direct detection commands. Monitoring kernel logs for errors related to netfs or PG_private_2 could indicate exploitation or misconfiguration.

Impact Analysis

This vulnerability could lead to memory leaks or corruption in the Linux kernel, potentially causing system instability, crashes, or performance degradation. It may affect systems using network filesystems that rely on the netfs subsystem for caching operations.

Mitigation Strategies

Update the Linux kernel to the latest stable version that includes the fix for this vulnerability. If immediate patching is not possible, consider disabling affected netfs features temporarily until the update is applied.

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