{"id":"CVE-2023-54218","summary":"net: Fix load-tearing on sk-\u003esk_stamp in sock_recv_cmsgs().","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Fix load-tearing on sk-\u003esk_stamp in sock_recv_cmsgs().\n\nKCSAN found a data race in sock_recv_cmsgs() where the read access\nto sk-\u003esk_stamp needs READ_ONCE().\n\nBUG: KCSAN: data-race in packet_recvmsg / packet_recvmsg\n\nwrite (marked) to 0xffff88803c81f258 of 8 bytes by task 19171 on cpu 0:\n sock_write_timestamp include/net/sock.h:2670 [inline]\n sock_recv_cmsgs include/net/sock.h:2722 [inline]\n packet_recvmsg+0xb97/0xd00 net/packet/af_packet.c:3489\n sock_recvmsg_nosec net/socket.c:1019 [inline]\n sock_recvmsg+0x11a/0x130 net/socket.c:1040\n sock_read_iter+0x176/0x220 net/socket.c:1118\n call_read_iter include/linux/fs.h:1845 [inline]\n new_sync_read fs/read_write.c:389 [inline]\n vfs_read+0x5e0/0x630 fs/read_write.c:470\n ksys_read+0x163/0x1a0 fs/read_write.c:613\n __do_sys_read fs/read_write.c:623 [inline]\n __se_sys_read fs/read_write.c:621 [inline]\n __x64_sys_read+0x41/0x50 fs/read_write.c:621\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nread to 0xffff88803c81f258 of 8 bytes by task 19183 on cpu 1:\n sock_recv_cmsgs include/net/sock.h:2721 [inline]\n packet_recvmsg+0xb64/0xd00 net/packet/af_packet.c:3489\n sock_recvmsg_nosec net/socket.c:1019 [inline]\n sock_recvmsg+0x11a/0x130 net/socket.c:1040\n sock_read_iter+0x176/0x220 net/socket.c:1118\n call_read_iter include/linux/fs.h:1845 [inline]\n new_sync_read fs/read_write.c:389 [inline]\n vfs_read+0x5e0/0x630 fs/read_write.c:470\n ksys_read+0x163/0x1a0 fs/read_write.c:613\n __do_sys_read fs/read_write.c:623 [inline]\n __se_sys_read fs/read_write.c:621 [inline]\n __x64_sys_read+0x41/0x50 fs/read_write.c:621\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nvalue changed: 0xffffffffc4653600 -\u003e 0x0000000000000000\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 1 PID: 19183 Comm: syz-executor.5 Not tainted 6.3.0-rc7-02330-gca6270c12e20 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014","modified":"2026-04-02T09:43:43.698292Z","published":"2025-12-30T12:11:14.059Z","related":["SUSE-SU-2026:0473-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54218.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/564c3150ad357d571a0de7d8b644aa1f7e6e21b7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7145f2309d649ad6273b9f66448321b9b4c523c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8319220054e5ea5f506d8d4c4b5e234f668ffc3b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d06f67b2b8dcd00d995c468428b6bccebc5762d8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7343f8de019ebb55b2b6ef79b971f6ceb361a99"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de260d1e02cde39d317066835ee6e5234fc9f5a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dfd9248c071a3710c24365897459538551cb7167"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd28692fa182d25e8d26bc1db506648839fde245"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54218.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54218"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6c7c98bad4883a4a8710c96b2b44de482865eb6e"},{"fixed":"fd28692fa182d25e8d26bc1db506648839fde245"},{"fixed":"564c3150ad357d571a0de7d8b644aa1f7e6e21b7"},{"fixed":"d7343f8de019ebb55b2b6ef79b971f6ceb361a99"},{"fixed":"d06f67b2b8dcd00d995c468428b6bccebc5762d8"},{"fixed":"de260d1e02cde39d317066835ee6e5234fc9f5a8"},{"fixed":"7145f2309d649ad6273b9f66448321b9b4c523c8"},{"fixed":"8319220054e5ea5f506d8d4c4b5e234f668ffc3b"},{"fixed":"dfd9248c071a3710c24365897459538551cb7167"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54218.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"4.14.316"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.284"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.244"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.181"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.3.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54218.json"}}],"schema_version":"1.7.5"}