CVE-2026-92494
Description
AI Translation Available
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.
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
https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113
https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954