Information Exposure Affecting torvalds/linux package, versions [4.11,5.15.212)[5.16,6.1.178)[6.2,6.6.145)[6.7,6.12.96)[6.13,6.18.39)[6.19,7.1.4)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20791123
- published11 Oct 2026
- disclosed23 Jul 2026
- creditUnknown
Introduced: 23 Jul 2026
CVE-2026-64600 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure in the xfs_reflink_fill_cow_hole and xfs_reflink_fill_delalloc process. An attacker can gain unauthorized access to sensitive information and escalate privileges by exploiting a race condition between reflink and direct I/O write operations on an XFS filesystem, which allows persistent writes into protected files while preserving their metadata. This is only exploitable if the attacker has local access and can control both racing writers on the affected filesystem.
Note: The Linux kernel project assigns a CVE to every bug fix it ships, whether or not the bug has been shown to be exploitable. This advisory was generated from that process and has not been individually assessed for exploitability. See the kernel's CVE process documentation: https://github.com/torvalds/linux/blob/master/Documentation/process/cve.rst