Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 644b666c202cce12ccfcf9ded67089b18f4f7659; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 4a042d8e5f34282577ece50515cea8bb1246914d; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before bd8b4572528f9604a13bf3c7c2a167f5cf222f72; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 57db27ccc162afe0726cffec0ae62e410ed2d0e9; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 536407b272402af679155910d7fdeeb4834eefb9; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 6452c13646af7c13d7f6668b6690cfb2427e7f7b; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5; affected c729696bcf8b23450043dd9c9972c15e53419ae4 before 2a1780f9fc2493bd34c418a0be6fc58943afcecf |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659
- https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d
- https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72
- https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9
- https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9
- https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b
- https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5
- https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf