CVE-2021-47516
nfp: Fix memory leak in nfp_cpp_area_cache_add()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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 }
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: nfp: corrige la pérdida de memoria en nfp_cpp_area_cache_add() En la línea 800 (#1), nfp_cpp_area_alloc() asigna e inicializa una estructura de área CPP. Pero en la línea 807 (#2), cuando falla la asignación de caché, esta estructura de área CPP no se libera, lo que resultará en una pérdida de memoria. Podemos solucionarlo liberando el área de CPP cuando falla la asignación de caché (#2). 792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t tamaño) 793 { 794 struct nfp_cpp_area_cache *cache; 795 estructura nfp_cpp_area *área; área 800 = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0), 801 0, tamaño); // #1: asigna e inicializa 802 if (!area) 803 return -ENOMEM; 805 caché = kzalloc(sizeof(*cache), GFP_KERNEL); 806 si (!cache) 807 retorno -ENOMEM; // #2: falta el retorno 817 gratuito 0; 818 }
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-24 CVE Reserved
- 2024-05-24 CVE Published
- 2024-06-11 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-401: Missing Release of Memory after Effective Lifetime
CAPEC
References (7)
URL | Tag | Source |
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https://git.kernel.org/stable/c/4cb584e0ee7df70fd0376aee60cf701855ea8c81 | Vuln. Introduced |
URL | Date | SRC |
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URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 4.14.258 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 4.14.258" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 4.19.221 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 4.19.221" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 5.4.165 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 5.4.165" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 5.10.85 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 5.10.85" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 5.15.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 5.15.8" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.11 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.11 < 5.16" | en |
Affected
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