CVE-2026-89458s390/dasd: Do not complete a failed ESE read as successful
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- 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 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 8cb96cffceead3cbd0541154d7ecc5e6474edda1; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 77168af195d04b34c6de62b874624e74d64cef8d; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 921ff697bb6f7067059793becf8b2d00de71ce41; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 55f4df40178cdfede0d7ae848fbab00efa9b95c1; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before c9adf8399732306dfc97b3adb4778038743e3f5e; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 52b331c99baac653ca794bd8487c8ec4de8db203; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before cddb447c62466f3076938ce120028d7b591f9f37; and 4 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/8cb96cffceead3cbd0541154d7ecc5e6474edda1
- https://git.kernel.org/stable/c/77168af195d04b34c6de62b874624e74d64cef8d
- https://git.kernel.org/stable/c/921ff697bb6f7067059793becf8b2d00de71ce41
- https://git.kernel.org/stable/c/55f4df40178cdfede0d7ae848fbab00efa9b95c1
- https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e
- https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203
- https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f
- https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37
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.