CVE-2025-40055
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix double free in user_cluster_connect() user_cluster_disconnect() frees "conn->cc_private" which is "lc" but then the error handling frees "lc" a second time. Set "lc" to NULL on this path to avoid a double free.
Affected versions
Linux kernel versions
3.14
and later are affected. Fixed in
5.4.301,
5.10.246,
5.15.195,
6.1.156,
6.6.112,
6.12.53,
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40055 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/283333079d96c84baa91f0c62b5e0cbec246b7a2
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PatchKernel patch commithttps://git.kernel.org/stable/c/694d5b401036a614f8080085a9de6f86ff0742dc
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PatchKernel patch commithttps://git.kernel.org/stable/c/7e76fe9dfadbc00364d7523d5a109e9d3e4a7db2
Frequently asked questions
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What is CVE-2025-40055?
CVE-2025-40055 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.14 onward and has been patched in 5.4.301, 5.10.246, 5.15.195 and others. CVE-2025-40055 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-40055?
Yes — CVE-2025-40055 has been patched. Fixed versions include 5.4.301, 5.10.246, 5.15.195 and others. If you are running Linux kernel 3.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40055 actively exploited?
No — CVE-2025-40055 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.