CVE-2026-64146
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | bb88e8da00253bea0e7f0f4cdfd7910572d7799f < 492c73b21fefa36f3869cb2b188ffb7fe37b3a9b | affected |
| Linux | Linux | bb88e8da00253bea0e7f0f4cdfd7910572d7799f < 79b09c54c6563df9846ca3094bcfd72082c3e1d7 | affected |
| Linux | Linux | 5.17 | affected |
| Linux | Linux | 0 < 5.17 | unaffected |
| Linux | Linux | 7.0.11 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b
- https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7
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