CVE-2026-92494
Description
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.
How to fix
- Linux Linuxa9a6ec1298f9bc134b2c5db27d25bb10603b7113, 35fc83c65faf7949f5701bb34b20f822560a7718, 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe, 6ec53ccab0d691b3c73e03d930343ca45987e88d, 1399f102d8a1855c1a38506057306ec79d0787d9, e1e342d9a561c016b8531ec1f4dcefaad9d64954, 05704335803b69c1bfa8637b7ada942bf2ee8a41 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < a9a6ec1298f9bc134b2c5db27d25bb10603b7113, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < 35fc83c65faf7949f5701bb34b20f822560a7718, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < 6ec53ccab0d691b3c73e03d930343ca45987e88d, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < 1399f102d8a1855c1a38506057306ec79d0787d9, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < e1e342d9a561c016b8531ec1f4dcefaad9d64954, 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ≤ v < 05704335803b69c1bfa8637b7ada942bf2ee8a41, 5.15 | a9a6ec1298f9bc134b2c5db27d25bb10603b7113, 35fc83c65faf7949f5701bb34b20f822560a7718, 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe, 6ec53ccab0d691b3c73e03d930343ca45987e88d, 1399f102d8a1855c1a38506057306ec79d0787d9, e1e342d9a561c016b8531ec1f4dcefaad9d64954, 05704335803b69c1bfa8637b7ada942bf2ee8a41 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.