CVE-2025-40101
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory leaks when rejecting a non SINGLE data profile without an RST At the end of btrfs_load_block_group_zone_info() the first thing we do is to ensure that if the mapping type is not a SINGLE one and there is no RAID stripe tree, then we return early with an error. Doing that, though, prevents the code from running the last calls from this function which are about freeing memory allocated during its run. Hence, in this case, instead of returning early, we set the ret value and fall through the rest of the cleanup code.
Affected versions
Linux kernel versions
6.7.11,
6.8
and later are affected. Fixed in
6.12.55,
6.17.5,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40101 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/187333e6d484c6630286bfdd07c79d6815a63887
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PatchKernel patch commithttps://git.kernel.org/stable/c/602701d00439e113331ee9c1283e95afdcb8849d
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PatchKernel patch commithttps://git.kernel.org/stable/c/fec9b9d3ced39f16be8d7afdf81f4dd2653da319
Frequently asked questions
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What is CVE-2025-40101?
CVE-2025-40101 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.7.11 onward and has been patched in 6.12.55, 6.17.5 and 6.18. CVE-2025-40101 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-2025-40101?
Yes — CVE-2025-40101 has been patched. Fixed versions include 6.12.55, 6.17.5 and 6.18. If you are running Linux kernel 6.7.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40101 actively exploited?
No — CVE-2025-40101 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.