CVE-2026-89457Medium· 5.5▾ SunlitIn 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->pri…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 4.7
none → medium
— → 5.5
none → medium
0.2% → 0.2%
Last analysed / modified upstream
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.
Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 644b666c202cce12ccfcf9ded67089b18f4f7659Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 4a042d8e5f34282577ece50515cea8bb1246914dLinux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < bd8b4572528f9604a13bf3c7c2a167f5cf222f72Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 57db27ccc162afe0726cffec0ae62e410ed2d0e9Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 536407b272402af679155910d7fdeeb4834eefb9Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 6452c13646af7c13d7f6668b6690cfb2427e7f7bLinux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5Linux >= c729696bcf8b23450043dd9c9972c15e53419ae4 < 2a1780f9fc2493bd34c418a0be6fc58943afcecfLinux 5.3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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