CVE-2021-47516

published 2024-05-24

CVE-2021-47516: 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()…

Priority P4 18 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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 }

Affected

17 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.15.15-1 (bookworm)	linux 5.15.15-1 (bookworm)
linux	linux	—	—
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < 3e93abcdcec0436fbf0b6a88ae806902426895a2	3e93abcdcec0436fbf0b6a88ae806902426895a2
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < eb51f639ef3fd5498b7def290ed8681b6aadd9a7	eb51f639ef3fd5498b7def290ed8681b6aadd9a7
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < 2e0e072e62fdaf7816220af08e05c020f0fcb77a	2e0e072e62fdaf7816220af08e05c020f0fcb77a
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < 484069b5de9d223cc1c64c6f80389a99cfef51f1	484069b5de9d223cc1c64c6f80389a99cfef51f1
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < f707820c09239d6f67699d9b2ff57863cc7905b0	f707820c09239d6f67699d9b2ff57863cc7905b0
linux	linux	>= 4cb584e0ee7df70fd0376aee60cf701855ea8c81 < c56c96303e9289cc34716b1179597b6f470833de	c56c96303e9289cc34716b1179597b6f470833de
linux	linux_kernel	>= 0 < 5.10.92-1	5.10.92-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 4.11 < 4.14.258	4.14.258
linux	linux_kernel	>= 4.15 < 4.19.221	4.19.221
linux	linux_kernel	>= 4.20 < 5.4.165	5.4.165
linux	linux_kernel	>= 5.11 < 5.15.8	5.15.8
linux	linux_kernel	>= 5.5 < 5.10.85	5.10.85

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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