| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix memory leak in ip_mc_add1_src\n\nBUG: memory leak\nunreferenced object 0xffff888101bc4c00 (size 32):\n comm \"syz-executor527\", pid 360, jiffies 4294807421 (age 19.329s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................\n backtrace:\n [<00000000f17c5244>] kmalloc include/linux/slab.h:558 [inline]\n [<00000000f17c5244>] kzalloc include/linux/slab.h:688 [inline]\n [<00000000f17c5244>] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]\n [<00000000f17c5244>] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095\n [<000000001cb99709>] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416\n [<0000000052cf19ed>] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]\n [<0000000052cf19ed>] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423\n [<00000000477edfbc>] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857\n [<00000000e75ca9bb>] __sys_setsockopt+0x158/0x270 net/socket.c:2117\n [<00000000bdb993a8>] __do_sys_setsockopt net/socket.c:2128 [inline]\n [<00000000bdb993a8>] __se_sys_setsockopt net/socket.c:2125 [inline]\n [<00000000bdb993a8>] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125\n [<000000006a1ffdbd>] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47\n [<00000000b11467c4>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nIn commit 24803f38a5c0 (\"igmp: do not remove igmp souce list info when set\nlink down\"), the ip_mc_clear_src() in ip_mc_destroy_dev() was removed,\nbecause it was also called in igmpv3_clear_delrec().\n\nRough callgraph:\n\ninetdev_destroy\n-> ip_mc_destroy_dev\n -> igmpv3_clear_delrec\n -> ip_mc_clear_src\n-> RCU_INIT_POINTER(dev->ip_ptr, NULL)\n\nHowever, ip_mc_clear_src() called in igmpv3_clear_delrec() doesn't\nrelease in_dev->mc_list->sources. And RCU_INIT_POINTER() assigns the\nNULL to dev->ip_ptr. As a result, in_dev cannot be obtained through\ninetdev_by_index() and then in_dev->mc_list->sources cannot be released\nby ip_mc_del1_src() in the sock_close. Rough call sequence goes like:\n\nsock_close\n-> __sock_release\n -> inet_release\n -> ip_mc_drop_socket\n -> inetdev_by_index\n -> ip_mc_leave_src\n -> ip_mc_del_src\n -> ip_mc_del1_src\n\nSo we still need to call ip_mc_clear_src() in ip_mc_destroy_dev() to free\nin_dev->mc_list->sources." |
| } |
| ], |
| "affected": [ |
| { |
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| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ipv4/igmp.c" |
| ], |
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| "version": "b38c6e0bd5b5e439ecebdc0df599d573c2f610f8", |
| "status": "affected", |
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| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ipv4/igmp.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.9", |
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| "version": "0", |
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| "versionType": "semver" |
| }, |
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| "lessThanOrEqual": "4.9.*", |
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| "version": "4.14.238", |
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| }, |
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| }, |
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| "version": "5.4.128", |
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| }, |
| { |
| "version": "5.10.46", |
| "lessThanOrEqual": "5.10.*", |
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| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.13", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
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| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/0dc13e75507faa17ac9f7562b4ef7bf8fcd78422" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6cff57eea3347f79f1867cc53e1093b6614138d8" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1e28018b5c83d5073f74a6fb72eabe8370b2f501" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3dd2aeac2e9624cff9fa634710837e4f2e352758" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ac31cc837cafb57a271babad8ccffbf733caa076" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/77de6ee73f54a9a89c0afa0bf4c53b239aa9953a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/d8e2973029b8b2ce477b564824431f3385c77083" |
| } |
| ], |
| "title": "net: ipv4: fix memory leak in ip_mc_add1_src", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47238", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
