What’s Vulnerable › Vulnerabilities

CVE-2026-80897: netfs: release readahead folios on iterator preparation failure

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: release readahead folios on iterator preparation failure netfs_prepare_read_iterator() batches readahead folios in put_batch so that the folio references can be dropped after the I/O iterator has been prepared. If rolling_buffer_load_from_ra() fails after earlier folios have been batched, the function returns immediately and leaves those references held. Release the batch before returning the error.

Affected products

• Linux kernel: 6.14 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2c148a31ca01fc160aceec777bbc0041b0d0b8bd
• https://git.kernel.org/stable/c/87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6
• https://git.kernel.org/stable/c/935e7b74bb2368f215cf8c2ad4bff60ee4e7589e
• https://git.kernel.org/stable/c/9ef7c3c5cf771286f187aed199dac0972404cc0f

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