# CVE-2023-52980: linux: In the Linux kernel, the following vulnerability has been resolved:  block: ublk: extending queue_size to fix overflo...

CVE-2023-52980 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52980, released March 27, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52980
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 27, 2025

## Description

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".

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.11-1 | [DEBIAN-CVE-2023-52980](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52980.md) | Mar 27, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.11-1 | [DEBIAN-CVE-2023-52980](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52980.md) | Mar 27, 2025 |
| Linux | linux Debian 14 | 6.1.11-1 | [DEBIAN-CVE-2023-52980](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52980.md) | Mar 27, 2025 |

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