cve/published/2022/CVE-2022-49420.json

{
   "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: annotate races around sk->sk_bound_dev_if\n\nUDP sendmsg() is lockless, and reads sk->sk_bound_dev_if while\nthis field can be changed by another thread.\n\nAdds minimal annotations to avoid KCSAN splats for UDP.\nFollowing patches will add more annotations to potential lockless readers.\n\nBUG: KCSAN: data-race in __ip6_datagram_connect / udpv6_sendmsg\n\nwrite to 0xffff888136d47a94 of 4 bytes by task 7681 on cpu 0:\n __ip6_datagram_connect+0x6e2/0x930 net/ipv6/datagram.c:221\n ip6_datagram_connect+0x2a/0x40 net/ipv6/datagram.c:272\n inet_dgram_connect+0x107/0x190 net/ipv4/af_inet.c:576\n __sys_connect_file net/socket.c:1900 [inline]\n __sys_connect+0x197/0x1b0 net/socket.c:1917\n __do_sys_connect net/socket.c:1927 [inline]\n __se_sys_connect net/socket.c:1924 [inline]\n __x64_sys_connect+0x3d/0x50 net/socket.c:1924\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nread to 0xffff888136d47a94 of 4 bytes by task 7670 on cpu 1:\n udpv6_sendmsg+0xc60/0x16e0 net/ipv6/udp.c:1436\n inet6_sendmsg+0x5f/0x80 net/ipv6/af_inet6.c:652\n sock_sendmsg_nosec net/socket.c:705 [inline]\n sock_sendmsg net/socket.c:725 [inline]\n ____sys_sendmsg+0x39a/0x510 net/socket.c:2413\n ___sys_sendmsg net/socket.c:2467 [inline]\n __sys_sendmmsg+0x267/0x4c0 net/socket.c:2553\n __do_sys_sendmmsg net/socket.c:2582 [inline]\n __se_sys_sendmmsg net/socket.c:2579 [inline]\n __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2579\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nvalue changed: 0x00000000 -> 0xffffff9b\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 1 PID: 7670 Comm: syz-executor.3 Tainted: G        W         5.18.0-rc1-syzkaller-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\n\nI chose to not add Fixes: tag because race has minor consequences\nand stable teams busy enough."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/net/ip.h",
                  "include/net/sock.h",
                  "net/ipv6/datagram.c",
                  "net/ipv6/udp.c"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                     "lessThan": "20b2f61797873a2b18b5ff1a304ad2674fa1e0a5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                     "lessThan": "4c971d2f3548e4f11b1460ac048f5307e4b39fdb",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/net/ip.h",
                  "include/net/sock.h",
                  "net/ipv6/datagram.c",
                  "net/ipv6/udp.c"
               ],
               "versions": [
                  {
                     "version": "5.18.3",
                     "lessThanOrEqual": "5.18.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.19",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionEndExcluding": "5.18.3"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionEndExcluding": "5.19"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/20b2f61797873a2b18b5ff1a304ad2674fa1e0a5"
            },
            {
               "url": "https://git.kernel.org/stable/c/4c971d2f3548e4f11b1460ac048f5307e4b39fdb"
            }
         ],
         "title": "net: annotate races around sk->sk_bound_dev_if",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2022-49420",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}