{"id":"CVE-2022-50388","summary":"nvme: fix multipath crash caused by flush request when blktrace is enabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix multipath crash caused by flush request when blktrace is enabled\n\nThe flush request initialized by blk_kick_flush has NULL bio,\nand it may be dealt with nvme_end_req during io completion.\nWhen blktrace is enabled, nvme_trace_bio_complete with multipath\nactivated trying to access NULL pointer bio from flush request\nresults in the following crash:\n\n[ 2517.831677] BUG: kernel NULL pointer dereference, address: 000000000000001a\n[ 2517.835213] #PF: supervisor read access in kernel mode\n[ 2517.838724] #PF: error_code(0x0000) - not-present page\n[ 2517.842222] PGD 7b2d51067 P4D 0\n[ 2517.845684] Oops: 0000 [#1] SMP NOPTI\n[ 2517.849125] CPU: 2 PID: 732 Comm: kworker/2:1H Kdump: loaded Tainted: G S                5.15.67-0.cl9.x86_64 #1\n[ 2517.852723] Hardware name: XFUSION 2288H V6/BC13MBSBC, BIOS 1.13 07/27/2022\n[ 2517.856358] Workqueue: nvme_tcp_wq nvme_tcp_io_work [nvme_tcp]\n[ 2517.859993] RIP: 0010:blk_add_trace_bio_complete+0x6/0x30\n[ 2517.863628] Code: 1f 44 00 00 48 8b 46 08 31 c9 ba 04 00 10 00 48 8b 80 50 03 00 00 48 8b 78 50 e9 e5 fe ff ff 0f 1f 44 00 00 41 54 49 89 f4 55 \u003c0f\u003e b6 7a 1a 48 89 d5 e8 3e 1c 2b 00 48 89 ee 4c 89 e7 5d 89 c1 ba\n[ 2517.871269] RSP: 0018:ff7f6a008d9dbcd0 EFLAGS: 00010286\n[ 2517.875081] RAX: ff3d5b4be00b1d50 RBX: 0000000002040002 RCX: ff3d5b0a270f2000\n[ 2517.878966] RDX: 0000000000000000 RSI: ff3d5b0b021fb9f8 RDI: 0000000000000000\n[ 2517.882849] RBP: ff3d5b0b96a6fa00 R08: 0000000000000001 R09: 0000000000000000\n[ 2517.886718] R10: 000000000000000c R11: 000000000000000c R12: ff3d5b0b021fb9f8\n[ 2517.890575] R13: 0000000002000000 R14: ff3d5b0b021fb1b0 R15: 0000000000000018\n[ 2517.894434] FS:  0000000000000000(0000) GS:ff3d5b42bfc80000(0000) knlGS:0000000000000000\n[ 2517.898299] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 2517.902157] CR2: 000000000000001a CR3: 00000004f023e005 CR4: 0000000000771ee0\n[ 2517.906053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 2517.909930] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 2517.913761] PKRU: 55555554\n[ 2517.917558] Call Trace:\n[ 2517.921294]  \u003cTASK\u003e\n[ 2517.924982]  nvme_complete_rq+0x1c3/0x1e0 [nvme_core]\n[ 2517.928715]  nvme_tcp_recv_pdu+0x4d7/0x540 [nvme_tcp]\n[ 2517.932442]  nvme_tcp_recv_skb+0x4f/0x240 [nvme_tcp]\n[ 2517.936137]  ? nvme_tcp_recv_pdu+0x540/0x540 [nvme_tcp]\n[ 2517.939830]  tcp_read_sock+0x9c/0x260\n[ 2517.943486]  nvme_tcp_try_recv+0x65/0xa0 [nvme_tcp]\n[ 2517.947173]  nvme_tcp_io_work+0x64/0x90 [nvme_tcp]\n[ 2517.950834]  process_one_work+0x1e8/0x390\n[ 2517.954473]  worker_thread+0x53/0x3c0\n[ 2517.958069]  ? process_one_work+0x390/0x390\n[ 2517.961655]  kthread+0x10c/0x130\n[ 2517.965211]  ? set_kthread_struct+0x40/0x40\n[ 2517.968760]  ret_from_fork+0x1f/0x30\n[ 2517.972285]  \u003c/TASK\u003e\n\nTo avoid this situation, add a NULL check for req-\u003ebio before\ncalling trace_block_bio_complete.","modified":"2026-03-20T12:22:34.333830Z","published":"2025-09-18T13:33:08.612Z","related":["SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1","SUSE-SU-2025:4135-1","SUSE-SU-2025:4171-1","SUSE-SU-2025:4172-1","SUSE-SU-2025:4188-1","SUSE-SU-2025:4203-1","SUSE-SU-2025:4213-1","SUSE-SU-2025:4285-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50388.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/183c2aaef40a91acbaae45c3824d6cde7bb62b10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3659fb5ac29a5e6102bebe494ac789fd47fb78f4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4df413d46960f11c8c105238cfc3f5ff4c95c003"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f13301a69ababa6c2236fb4f0393b7e914e7e1e0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fcd2d199486033223e9b2a6a7f9a01dd0327eac3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50388.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50388"},{"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":"35fe0d12c8a3d5e45f297562732ddc9ba9dc58dd"},{"fixed":"f13301a69ababa6c2236fb4f0393b7e914e7e1e0"},{"fixed":"4df413d46960f11c8c105238cfc3f5ff4c95c003"},{"fixed":"fcd2d199486033223e9b2a6a7f9a01dd0327eac3"},{"fixed":"183c2aaef40a91acbaae45c3824d6cde7bb62b10"},{"fixed":"3659fb5ac29a5e6102bebe494ac789fd47fb78f4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50388.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}