CVE-2025-38549 – Linux efivarfs Memory Leak

CVE ID : CVE-2025-38549

Published : Aug. 16, 2025, 12:15 p.m. | 1 hour, 46 minutes ago

Description : In the Linux kernel, the following vulnerability has been resolved:

efivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths

When processing mount options, efivarfs allocates efivarfs_fs_info (sfi)
early in fs_context initialization. However, sfi is associated with the
superblock and typically freed when the superblock is destroyed. If the
fs_context is released (final put) before fill_super is called—such as
on error paths or during reconfiguration—the sfi structure would leak,
as ownership never transfers to the superblock.

Implement the .free callback in efivarfs_context_ops to ensure any
allocated sfi is properly freed if the fs_context is torn down before
fill_super, preventing this memory leak.

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…