CVE-2026-64146 is a vulnerability in Linux Kernel
Published on July 19, 2026
erofs: fix metabuf leak in inode xattr initialization
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix metabuf leak in inode xattr initialization
commit bb88e8da0025 ("erofs: use meta buffers for xattr operations")
converted xattr operations to use on-stack erofs_buf instances.
erofs_init_inode_xattrs() uses such a metabuf while reading the inline
xattr header and shared xattr id array.
Some error paths after erofs_read_metabuf() leave through out_unlock
without dropping the metabuf, so the folio reference can leak.
Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a
no-op if no folio has been acquired, and this keeps all paths after
taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.
Products Associated with CVE-2026-64146
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Affected Versions
Linux:- Version bb88e8da00253bea0e7f0f4cdfd7910572d7799f and below 492c73b21fefa36f3869cb2b188ffb7fe37b3a9b is affected.
- Version bb88e8da00253bea0e7f0f4cdfd7910572d7799f and below 79b09c54c6563df9846ca3094bcfd72082c3e1d7 is affected.
- Version 5.17 is affected.
- Before 5.17 is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.