CVE-2026-89457
s390/dasd: Guard sysfs discipline callbacks against unallocated private data
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
c729696bcf8b23450043dd9c9972c15e53419ae4 < 644b666c202cce12ccfcf9ded67089b18f4f7659 c729696bcf8b23450043dd9c9972c15e53419ae4 < 4a042d8e5f34282577ece50515cea8bb1246914d c729696bcf8b23450043dd9c9972c15e53419ae4 < bd8b4572528f9604a13bf3c7c2a167f5cf222f72 c729696bcf8b23450043dd9c9972c15e53419ae4 < 57db27ccc162afe0726cffec0ae62e410ed2d0e9 c729696bcf8b23450043dd9c9972c15e53419ae4 < 536407b272402af679155910d7fdeeb4834eefb9 c729696bcf8b23450043dd9c9972c15e53419ae4 < 6452c13646af7c13d7f6668b6690cfb2427e7f7b c729696bcf8b23450043dd9c9972c15e53419ae4 < 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5 c729696bcf8b23450043dd9c9972c15e53419ae4 < 2a1780f9fc2493bd34c418a0be6fc58943afcecf
Linux / Linux
5.3
References
git.kernel.org: https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659 git.kernel.org: https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d git.kernel.org: https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72 git.kernel.org: https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9 git.kernel.org: https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9 git.kernel.org: https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b git.kernel.org: https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5 git.kernel.org: https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf