{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2021-47237", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0.............\n 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x98/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(....\n 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@..........\n backtrace:\n [] __hw_addr_create_ex+0x5b/0x310\n [] __hw_addr_add_ex+0x1f8/0x2b0\n [] dev_addr_init+0x10b/0x1f0\n [] alloc_netdev_mqs+0x13b/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............\n 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x777/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x912/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "815f62bf7427", "version_value": "c634ba0b4159" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "2.6.14", "status": "affected" }, { "version": "0", "lessThan": "2.6.14", "status": "unaffected", "versionType": "custom" }, { "version": "4.4.274", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.9.274", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.238", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.196", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.128", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.46", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.12.13", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5" }, { "url": "https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b" }, { "url": "https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3" }, { "url": "https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119" }, { "url": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d" }, { "url": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f" }, { "url": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd" }, { "url": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }