# CVE-2021-47516: linux: In the Linux kernel, the following vulnerability has been resolved:  nfp: Fix memory leak in nfp_cpp_area_cache_add()...

CVE-2021-47516 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47516, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47516
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 24, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  nfp: Fix memory leak in nfp_cpp_area_cache_add()  In line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a CPP area structure. But in line 807 (#2), when the cache is allocated failed, this CPP area structure is not freed, which will result in memory leak.  We can fix it by freeing the CPP area when the cache is allocated failed (#2).  792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size) 793 { 794 	struct nfp_cpp_area_cache *cache; 795 	struct nfp_cpp_area *area;  800	area = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0), 801 				  0, size); 	// #1: allocates and initializes  802 	if (!area) 803 		return -ENOMEM;  805 	cache = kzalloc(sizeof(*cache), GFP_KERNEL); 806 	if (!cache) 807 		return -ENOMEM; // #2: missing free  817	return 0; 818 }

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-47516](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47516.md) | May 24, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-47516](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47516.md) | May 24, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-47516](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47516.md) | May 24, 2024 |

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