CVE-2026-89457
CVE CVE-2026-89457EUVD EUVD-2026-76363Published 2026-09-11T19:43:20.000ZLast changed 2026-09-14T11:59:57.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux c729696bcf8b23450043dd9c9972c15e53419ae4 <449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5; c729696bcf8b23450043dd9c9972c15e53419ae4 <536407b272402af679155910d7fdeeb4834eefb9; c729696bcf8b23450043dd9c9972c15e53419ae4 <2a1780f9fc2493bd34c418a0be6fc58943afcecf; patch: 7.2.4; c729696bcf8b23450043dd9c9972c15e53419ae4 <644b666c202cce12ccfcf9ded67089b18f4f7659; c729696bcf8b23450043dd9c9972c15e53419ae4 <bd8b4572528f9604a13bf3c7c2a167f5cf222f72; 5.3; patch: 6.18.50; patch: 6.12.109; patch: 5.10.270; patch: 6.1.188; c729696bcf8b23450043dd9c9972c15e53419ae4 <6452c13646af7c13d7f6668b6690cfb2427e7f7b; c729696bcf8b23450043dd9c9972c15e53419ae4 <4a042d8e5f34282577ece50515cea8bb1246914d; c729696bcf8b23450043dd9c9972c15e53419ae4 <57db27ccc162afe0726cffec0ae62e410ed2d0e9; patch: 6.6.157; patch: 0; patch: 5.15.221; patch: 7.3-rc1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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