{"cve":"CVE-2023-53056","nvd":{"published":"2025-05-02T16:15:24.680","modified":"2026-06-17T06:44:12.707","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Synchronize the IOCB count to be in order\n\nA system hang was observed with the following call trace:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 15 PID: 86747 Comm: nvme Kdump: loaded Not tainted 6.2.0+ #1\nHardware name: Dell Inc. PowerEdge R6515/04F3CJ, BIOS 2.7.3 03/31/2022\nRIP: 0010:__wake_up_common+0x55/0x190\nCode: 41 f6 01 04 0f 85 b2 00 00 00 48 8b 43 08 4c 8d\n      40 e8 48 8d 43 08 48 89 04 24 48 89 c6\\\n      49 8d 40 18 48 39 c6 0f 84 e9 00 00 00 <49> 8b 40 18 89 6c 24 14 31\n      ed 4c 8d 60 e8 41 8b 18 f6 c3 04 75 5d\nRSP: 0018:ffffb05a82afbba0 EFLAGS: 00010082\nRAX: 0000000000000000 RBX: ffff8f9b83a00018 RCX: 0000000000000000\nRDX: 0000000000000001 RSI: ffff8f9b83a00020 RDI: ffff8f9b83a00018\nRBP: 0000000000000001 R08: ffffffffffffffe8 R09: ffffb05a82afbbf8\nR10: 70735f7472617473 R11: 5f30307832616c71 R12: 0000000000000001\nR13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000\nFS:  00007f815cf4c740(0000) GS:ffff8f9eeed80000(0000)\n\tknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000000 CR3: 000000010633a000 CR4: 0000000000350ee0\nCall Trace:\n    <TASK>\n    __wake_up_common_lock+0x83/0xd0\n    qla_nvme_ls_req+0x21b/0x2b0 [qla2xxx]\n    __nvme_fc_send_ls_req+0x1b5/0x350 [nvme_fc]\n    nvme_fc_xmt_disconnect_assoc+0xca/0x110 [nvme_fc]\n    nvme_fc_delete_association+0x1bf/0x220 [nvme_fc]\n    ? nvme_remove_namespaces+0x9f/0x140 [nvme_core]\n    nvme_do_delete_ctrl+0x5b/0xa0 [nvme_core]\n    nvme_sysfs_delete+0x5f/0x70 [nvme_core]\n    kernfs_fop_write_iter+0x12b/0x1c0\n    vfs_write+0x2a3/0x3b0\n    ksys_write+0x5f/0xe0\n    do_syscall_64+0x5c/0x90\n    ? syscall_exit_work+0x103/0x130\n    ? syscall_exit_to_user_mode+0x12/0x30\n    ? do_syscall_64+0x69/0x90\n    ? exit_to_user_mode_loop+0xd0/0x130\n    ? exit_to_user_mode_prepare+0xec/0x100\n    ? syscall_exit_to_user_mode+0x12/0x30\n    ? do_syscall_64+0x69/0x90\n    ? syscall_exit_to_user_mode+0x12/0x30\n    ? do_syscall_64+0x69/0x90\n    entry_SYSCALL_64_after_hwframe+0x72/0xdc\n    RIP: 0033:0x7f815cd3eb97\n\nThe IOCB counts are out of order and that would block any commands from\ngoing out and subsequently hang the system. Synchronize the IOCB count to\nbe in correct order.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/6295b3ec64a3623fa96869ffb7cf17d0b3c92035","https://git.kernel.org/stable/c/6d57b77d7369ed73836c82b25f785b34923eef84","https://git.kernel.org/stable/c/d3affdeb400f3adc925bd996f3839481f5291839","https://git.kernel.org/stable/c/ffd7831841d3c56c655531fc8c5acafaaf20e1bb"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2023-53056","score":0.00201,"percentile":0.10059,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}