An integer overflow in the qla2x00_sysfs_write_optrom_ctl function in drivers/scsi/qla2xxx/qla_attr.c in the Linux kernel through 4.12.10 allows local users to cause a denial of service (memory corruption and system crash) by leveraging root access.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html | mailing list |
| https://usn.ubuntu.com/3583-2/ | vendor advisory |
| https://bugzilla.kernel.org/show_bug.cgi?id=194061 | issue tracking third party advisory |
| http://www.securityfocus.com/bid/100571 | vdb entry |
| https://patchwork.kernel.org/patch/9929625/ | third party advisory patch |
| https://usn.ubuntu.com/3583-1/ | vendor advisory |