Use After Free Affecting torvalds/linux package, versions [5.15,6.6.88)[6.7,6.12.25)[6.13,6.14.4)
Threat Intelligence
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-20699188
- published10 Oct 2026
- disclosed1 May 2025
- creditUnknown
Introduced: 1 May 2025
CVE-2025-37776 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.6.88, 6.12.25, 6.14.4 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the smb_break_all_levII_oplock process. An attacker can achieve arbitrary kernel code execution and kernel memory disclosure by exploiting a race condition through concurrent SMB2 connections, where one connection withholds the oplock break acknowledgment while others close handles on the same inode. This allows the attacker to reclaim freed memory with controlled data, manipulate kernel structures, and hijack control flow.
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