CVE-2022-50288

MEDIUM EPSS 4.4%

Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago

5.5 CVSS 3.1

Medium

Published Sep 15, 2025 9mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

5.5

Exploitability

1.8

Impact

3.6

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

4.4% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 9

Vendor	Product	Version	Range
linux	linux_kernel	*	≥3.14 – <4.14.303
linux	linux_kernel	*	≥4.15 – <4.19.270
linux	linux_kernel	*	≥4.20 – <5.4.229
linux	linux_kernel	*	≥5.5 – <5.10.163
linux	linux_kernel	*	≥5.11 – <5.15.87
linux	linux_kernel	*	≥5.16 – <6.0.19
linux	linux_kernel	*	≥6.1 – <6.1.5
linux	linux_kernel	6.2	any
linux	linux_kernel	6.2	any

References 8

git.kernel.org https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362

Patch
git.kernel.org https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2

Patch
git.kernel.org https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb

Patch
git.kernel.org https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707

Patch
git.kernel.org https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4

Patch
git.kernel.org https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a

Patch
git.kernel.org https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55

Patch
git.kernel.org https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768

Patch

Remediation

git.kernel.org https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362

Patch
git.kernel.org https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2

Patch
git.kernel.org https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb

Patch
git.kernel.org https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707

Patch
git.kernel.org https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4

Patch
git.kernel.org https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a

Patch
git.kernel.org https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55

Patch
git.kernel.org https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768

Patch