ext4: fix buffer_head leak in ext4_init_orphan_info
Summary
| CVE | CVE-2026-92494 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-09-17 17:17:51 UTC |
|---|
| Updated | 2026-09-17 17:17:51 UTC |
|---|
| 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. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 a9a6ec1298f9bc134b2c5db27d25bb10603b7113 git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 35fc83c65faf7949f5701bb34b20f822560a7718 git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 6ec53ccab0d691b3c73e03d930343ca45987e88d git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 1399f102d8a1855c1a38506057306ec79d0787d9 git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 e1e342d9a561c016b8531ec1f4dcefaad9d64954 git |
Not specified |
| CNA |
Linux |
Linux |
affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 05704335803b69c1bfa8637b7ada942bf2ee8a41 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.15 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.221 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.188 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.157 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.110 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.52 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2.6 7.2.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.3-rc1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.