Description
In the Linux kernel, the following vulnerability has been resolved:
s390/dasd: Guard sysfs discipline callbacks against unallocated private data
Several sysfs show/store handlers call a discipline callback that dereferences device->private, either directly or through the DASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline is assigned before check_device() allocates device->private, so an unprivileged read of one of these world-readable attributes in that window dereferences a NULL pointer and panics.
Guard the dereference inside each callback that actually touches device->private.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 644b666c202cce12ccfcf9ded67089b18f4f7659; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 4a042d8e5f34282577ece50515cea8bb1246914d; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < bd8b4572528f9604a13bf3c7c2a167f5cf222f72; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 57db27ccc162afe0726cffec0ae62e410ed2d0e9; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 536407b272402af679155910d7fdeeb4834eefb9; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 6452c13646af7c13d7f6668b6690cfb2427e7f7b; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5; >= c729696bcf8b23450043dd9c9972c15e53419ae4, < 2a1780f9fc2493bd34c418a0be6fc58943afcecf |
| Linux | Linux | 5.3 |
References
- https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf
- https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5
- https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d
- https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9
- https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9
- https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659
- https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b
- https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received