VulnerabilityPublished 4 Sep 2026Updated 21 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 935e7b74bb2368f215cf8c2ad4bff60ee4e7589e : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 935e7b74bb2368f215cf8c2ad4bff60ee4e7589e, 87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6, 9ef7c3c5cf771286f187aed199dac0972404cc0f +1

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 935e7b74bb2368f215cf8c2ad4bff60ee4e7589e, 87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6, 9ef7c3c5cf771286f187aed199dac0972404cc0f or 2c148a31ca01fc160aceec777bbc0041b0d0b8bd.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 06fa229ceb36898e68022b5654c017d2c6582d7d, < 935e7b74bb2368f215cf8c2ad4bff60ee4e7589e	Fixed in 935e7b74bb2368f215cf8c2ad4bff60ee4e7589e
LinuxLinux	Affected ≥ 06fa229ceb36898e68022b5654c017d2c6582d7d, < 87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6	Fixed in 87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6
LinuxLinux	Affected ≥ e0186fa7436e55db10cecc2308749e2a877269a5, < 9ef7c3c5cf771286f187aed199dac0972404cc0f	Fixed in 9ef7c3c5cf771286f187aed199dac0972404cc0f
LinuxLinux	Affected ≥ 06fa229ceb36898e68022b5654c017d2c6582d7d, < 2c148a31ca01fc160aceec777bbc0041b0d0b8bd	Fixed in 2c148a31ca01fc160aceec777bbc0041b0d0b8bd
LinuxLinux	Affected =6.14	Fixed in–

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.

References

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