Squashfs: reject negative file sizes in squashfs_read_inode()
Priority LOW 22Published · Updated
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 5 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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]
Why it matters now
EPSS 0.00211 11th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.301, 5.10.246, 5.15.195 +5Red Hat: 5 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.29 and later | 5.4.301, 5.10.246, 5.15.195, 6.1.157, 6.6.113, 6.12.54, 6.17.4, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.29 and later 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 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) 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
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40200
- 2026-10-03 Alias added: GHSA-w4gv-xmrm-6wxx
References
Other 8
- https://git.kernel.org/stable/c/54170057a5fadd24a37b70de41e61d39284d9bd7
- https://git.kernel.org/stable/c/2871c74caa3f4f05b429e6bfefebac62dbf1b408
- https://git.kernel.org/stable/c/fbfc745db628de31f5c089147deeb87e95b89e66
- https://git.kernel.org/stable/c/8118f66124895829443d09c207e654adcb2f9321
- https://git.kernel.org/stable/c/8c7aad76751816207fee556d44aa88a710824810
- https://git.kernel.org/stable/c/875fb3f87ae0225b881319ba016a1a8c4ffd5812
- https://git.kernel.org/stable/c/f271155ff31aca8ef82c61c8df23ca97e9a77dd4
- https://git.kernel.org/stable/c/9f1c14c1de1bdde395f6cc893efa4f80a2ae3b2b
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Sources
- CVE-2025-40200 · CVE Program
- CVE-2025-40200 · NVD
- FIRST EPSS
- GHSA-w4gv-xmrm-6wxx · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40200 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences