Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: block: ublk: extending queue_size to fix overflow When validating drafted SPDK ublk target, in a case that assigning large queue depth to multiqueue ublk device, ublk target would run into a weird incorrect state. During rounds of review and debug, An overflow bug was found in ublk driver. In ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH is 4096 which means each ublk queue depth can be set as large as 4096. But when setting qd for a ublk device, sizeof(struct ublk_queue) + depth * sizeof(struct ublk_io) will be larger than 65535 if qd is larger than 2728. Then queue_size is overflowed, and ublk_get_queue() references a wrong pointer position. The wrong content of ublk_queue elements will lead to out-of-bounds memory access. Extend queue_size in ublk_device as "unsigned int".
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 71f28f3136aff5890cd56de78abc673f8393cad9 before ee1e3fe4b4579f856997190a00ea4db0307b4332; affected 71f28f3136aff5890cd56de78abc673f8393cad9 before 29baef789c838bd5c02f50c88adbbc6b955aaf61 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.11 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.