# CVE-2021-47467: linux: In the Linux kernel, the following vulnerability has been resolved:  kunit: fix reference count leak in kfree_at_end...

CVE-2021-47467 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47467, released May 22, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47467
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 22, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  kunit: fix reference count leak in kfree_at_end  The reference counting issue happens in the normal path of kfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the function forgets to handle the returned resource object, whose refcount increased inside, causing a refcount leak.  Fix this issue by calling kunit_alloc_resource() instead of kunit_alloc_and_get_resource().  Fixed the following when applying: Shuah Khan <skhan@linuxfoundation.org>  CHECK: Alignment should match open parenthesis +	kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL,  				     (void *)to_free);

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.16-1 | [DEBIAN-CVE-2021-47467](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47467.md) | May 22, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.16-1 | [DEBIAN-CVE-2021-47467](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47467.md) | May 22, 2024 |
| Linux | linux Debian 14 | 5.14.16-1 | [DEBIAN-CVE-2021-47467](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47467.md) | May 22, 2024 |

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