CVE-2021-47068
Vulnerability from cvelistv5
Published
2024-02-29 22:37
Modified
2024-11-04 11:58
Severity ?
Summary
net/nfc: fix use-after-free llcp_sock_bind/connect
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/18175fe17ae043a0b81e5d511f8817825784c299
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/18ae4a192a4496e48a5490b52812645d2413307c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26157c82ba756767b2bd66d28a71b1bc454447f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/374cdde4dcc9c909a60713abdbbf96d5e3e09f91
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48fba458fe54cc2a980a05c13e6c19b8b2cfb610
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b7021ed36dabf29e56842e3408781cd3b82ef6e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ccddad6dd28530e716448e594c9ca7c76ccd0570
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e32352070bcac22be6ed8ab635debc280bb65b8c
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/nfc: fix use-after-free llcp_sock_bind/connect\n\nCommits 8a4cd82d (\"nfc: fix refcount leak in llcp_sock_connect()\")\nand c33b1cc62 (\"nfc: fix refcount leak in llcp_sock_bind()\")\nfixed a refcount leak bug in bind/connect but introduced a\nuse-after-free if the same local is assigned to 2 different sockets.\n\nThis can be triggered by the following simple program:\n    int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n    int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n    memset( \u0026addr, 0, sizeof(struct sockaddr_nfc_llcp) );\n    addr.sa_family = AF_NFC;\n    addr.nfc_protocol = NFC_PROTO_NFC_DEP;\n    bind( sock1, (struct sockaddr*) \u0026addr, sizeof(struct sockaddr_nfc_llcp) )\n    bind( sock2, (struct sockaddr*) \u0026addr, sizeof(struct sockaddr_nfc_llcp) )\n    close(sock1);\n    close(sock2);\n\nFix this by assigning NULL to llcp_sock-\u003elocal after calling\nnfc_llcp_local_put.\n\nThis addresses CVE-2021-23134."
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}


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