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VulnerabilityPublished Updated

CVE-2024-56565: Linux kernel · f2fs: fix to drop all discards after creating snapshot on lvm device

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 14:33 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Dec 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 30 Oct 2026.

What to do

AI-suggested

A patch has been applied to the Linux kernel to fix this issue by dropping remaining discard commands after snapshot creation and validating discard_max_bytes before issuing discard commands. Users should update to the fixed kernel versions once available. No other mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's f2fs filesystem was fixed to prevent kernel panic caused by improper handling of discard commands after creating a snapshot on an LVM device. The issue occurs because discard_max_bytes is set to zero after snapshot creation, leading to a NULL bio pointer and kernel panic when discard commands are submitted.

References

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