{"id":"AZL-68621","summary":"CVE-2022-49420 affecting package kernel 5.15.200.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: annotate races around sk-\u003esk_bound_dev_if\n\nUDP sendmsg() is lockless, and reads sk-\u003esk_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 -\u003e 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.","modified":"2026-04-21T04:38:28.045329Z","published":"2025-02-26T07:01:18Z","upstream":["CVE-2022-49420"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49420"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.15.200.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-68621.json"}}],"schema_version":"1.7.5"}