CVE-2025-40200
In the Linux kernel, the following vulnerability has been resolved: Squashfs: reject negative file sizes in squashfs_read_inode() Syskaller reports a "WARNING in ovl_copy_up_file" in overlayfs. This warning is ultimately caused because the underlying Squashfs file system returns a file with a negative file size. This commit checks for a negative file size and returns EINVAL. [[email protected]: only need to check 64 bit quantity]
Affected versions
Linux kernel versions
2.6.29
and later are affected. Fixed in
5.4.301,
5.10.246,
5.15.195,
6.1.157,
6.6.113,
6.12.54,
6.17.4,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40200 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/2871c74caa3f4f05b429e6bfefebac62dbf1b408
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PatchKernel patch commithttps://git.kernel.org/stable/c/54170057a5fadd24a37b70de41e61d39284d9bd7
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PatchKernel patch commithttps://git.kernel.org/stable/c/8118f66124895829443d09c207e654adcb2f9321
Frequently asked questions
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What is CVE-2025-40200?
CVE-2025-40200 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.29 onward and has been patched in 5.4.301, 5.10.246, 5.15.195 and others. CVE-2025-40200 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-2025-40200?
Yes — CVE-2025-40200 has been patched. Fixed versions include 5.4.301, 5.10.246, 5.15.195 and others. If you are running Linux kernel 2.6.29 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40200 actively exploited?
No — CVE-2025-40200 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.