UNKNOWN NVD
CVE-2026-92494
In the Linux kernel, the following vulnerability has been resolved: ext4: fix buffer_head leak in ext4_init_orphan_info ext4_init_orphan_info() reads orphan f
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix buffer_head leak in ext4_init_orphan_info
ext4_init_orphan_info() reads orphan file blocks with ext4_bread()
and stores the returned buffer_head in oi->of_binfo[i].ob_bh.
If ext4_bread() succeeds but the orphan block magic or checksum
validation fails, the function jumps to out_free. However, the old
out_free loop starts releasing buffers from i - 1, so the current
buffer_head at index i is skipped.
This leaks the buffer_head reference obtained by ext4_bread() on the
bad magic and bad checksum error paths.
Fix this by tracking the number of successfully read buffer_heads and
releasing exactly those buffer_heads on the error path.
References
- https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41
- https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9
- https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718
- https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d
- https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe
This unknown severity vulnerability was published on 2026-09-17 via NVD.
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