{"id":"CVE-2022-50295","summary":"io_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()\n\nSyzkaller produced the below call trace:\n\n BUG: KASAN: null-ptr-deref in io_msg_ring+0x3cb/0x9f0\n Write of size 8 at addr 0000000000000070 by task repro/16399\n\n CPU: 0 PID: 16399 Comm: repro Not tainted 6.1.0-rc1 #28\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0xcd/0x134\n  ? io_msg_ring+0x3cb/0x9f0\n  kasan_report+0xbc/0xf0\n  ? io_msg_ring+0x3cb/0x9f0\n  kasan_check_range+0x140/0x190\n  io_msg_ring+0x3cb/0x9f0\n  ? io_msg_ring_prep+0x300/0x300\n  io_issue_sqe+0x698/0xca0\n  io_submit_sqes+0x92f/0x1c30\n  __do_sys_io_uring_enter+0xae4/0x24b0\n....\n RIP: 0033:0x7f2eaf8f8289\n RSP: 002b:00007fff40939718 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa\n RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2eaf8f8289\n RDX: 0000000000000000 RSI: 0000000000006f71 RDI: 0000000000000004\n RBP: 00007fff409397a0 R08: 0000000000000000 R09: 0000000000000039\n R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004006d0\n R13: 00007fff40939880 R14: 0000000000000000 R15: 0000000000000000\n  \u003c/TASK\u003e\n Kernel panic - not syncing: panic_on_warn set ...\n\nWe don't have a NULL check on file_ptr in io_msg_send_fd() function,\nso when file_ptr is NUL src_file is also NULL and get_file()\ndereferences a NULL pointer and leads to above crash.\n\nAdd a NULL check to fix this issue.","modified":"2026-04-02T08:28:23.635292Z","published":"2025-09-15T14:45:51.241Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50295.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0163e04ea64cc3dfaa12390286e5f2f481c3b2e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/16bbdfe5fb0e78e0acb13e45fc127e9a296913f2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50295.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50295"},{"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":"e6130eba8a848a7a6ba6c534bd8f6d60749ae1a9"},{"fixed":"0163e04ea64cc3dfaa12390286e5f2f481c3b2e3"},{"fixed":"16bbdfe5fb0e78e0acb13e45fc127e9a296913f2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50295.json"}}],"schema_version":"1.7.5"}