# CVE-2022-50288: linux: In the Linux kernel, the following vulnerability has been resolved:  qlcnic: prevent ->dcb use-after-free on qlcnic_d...

CVE-2022-50288 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50288, released September 15, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50288
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 15, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure  adapter->dcb would get silently freed inside qlcnic_dcb_enable() in case qlcnic_dcb_attach() would return an error, which always happens under OOM conditions. This would lead to use-after-free because both of the existing callers invoke qlcnic_dcb_get_info() on the obtained pointer, which is potentially freed at that point.  Propagate errors from qlcnic_dcb_enable(), and instead free the dcb pointer at callsite using qlcnic_dcb_free(). This also removes the now unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around kfree() also causing memory leaks for partially initialized dcb.  Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.7-1 | [DEBIAN-CVE-2022-50288](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50288.md) | Sep 15, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.7-1 | [DEBIAN-CVE-2022-50288](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50288.md) | Sep 15, 2025 |
| Linux | linux Debian 14 | 6.1.7-1 | [DEBIAN-CVE-2022-50288](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50288.md) | Sep 15, 2025 |

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