CVE-2026-92494ext4: fix buffer_head leak in ext4_init_orphan_info
Updated under an hour ago ()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before a9a6ec1298f9bc134b2c5db27d25bb10603b7113; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before 35fc83c65faf7949f5701bb34b20f822560a7718; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before 6ec53ccab0d691b3c73e03d930343ca45987e88d; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before 1399f102d8a1855c1a38506057306ec79d0787d9; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before e1e342d9a561c016b8531ec1f4dcefaad9d64954; from 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 before 05704335803b69c1bfa8637b7ada942bf2ee8a41 | CNA record |
References
- https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113
- https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718
- https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe
- https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d
- https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9
- https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954
- https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.