CVE-2026-64217 Details
Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.
A vulnerability has been addressed in the Linux kernel's netfs component, specifically within the 'netfs_extract_user_iter()' function. This issue arises when 'iov_iter_extract_pages()' overfills the 'pages' array, leading to memory corruption. The vulnerability allows the overfilled pages to be included in the iterator constructed at the end of the function, which can cause unintended behavior or data handling issues.
Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability. Instructions for downloading the patched version can be found in the Linux kernel Git repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d | kernel.org | Patch |
| https://git.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94d | kernel.org | Patch |
| https://git.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.3, < 6.6.142 >= 6.7, < 6.12.92 >= 6.13, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 11, 2026 | Initial Analysis | [email protected] |
| Jul 27, 2026 | CVE Modified | kernel.org |
| Jul 24, 2026 | New CVE Received | kernel.org |