Description
In the Linux kernel, the following vulnerability has been resolved:
s390/dasd: Do not complete a failed ESE read as successful
dasd_int_handler() completes an NRF read of an unallocated ESE track by calling ese_read() and unconditionally marking the request DASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has zeroed the destination buffer: a failed sense-data parse or a current track outside the requested range both return early, leaving the destination pages untouched. The request is still completed successfully, so the block layer is handed stale / uninitialized memory instead of zeros.
Check the ese_read() return value and fail the request through the normal error path instead of forcing DASD_CQR_SUCCESS.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < 8cb96cffceead3cbd0541154d7ecc5e6474edda1; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < 77168af195d04b34c6de62b874624e74d64cef8d; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < 921ff697bb6f7067059793becf8b2d00de71ce41; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < 55f4df40178cdfede0d7ae848fbab00efa9b95c1; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < c9adf8399732306dfc97b3adb4778038743e3f5e; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < 52b331c99baac653ca794bd8487c8ec4de8db203; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f; >= 5e6bdd37c5526ef01326df5dabb93011ee89237e, < cddb447c62466f3076938ce120028d7b591f9f37; fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04; 5f7c9989f11305aaa43e0f4378f4f070022a9f2b; >= 5.4.26, < 5.5; >= 5.5.10, < 5.6 |
| Linux | Linux | 5.6 |
References
- https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203
- https://git.kernel.org/stable/c/55f4df40178cdfede0d7ae848fbab00efa9b95c1
- https://git.kernel.org/stable/c/77168af195d04b34c6de62b874624e74d64cef8d
- https://git.kernel.org/stable/c/8cb96cffceead3cbd0541154d7ecc5e6474edda1
- https://git.kernel.org/stable/c/921ff697bb6f7067059793becf8b2d00de71ce41
- https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f
- https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e
- https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received