{"cve":"CVE-2022-49701","nvd":{"published":"2025-02-26T07:01:44.930","modified":"2026-08-04T10:17:54.377","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ibmvfc: Allocate/free queue resource only during probe/remove\n\nCurrently, the sub-queues and event pool resources are allocated/freed for\nevery CRQ connection event such as reset and LPM. This exposes the driver\nto a couple issues. First the inefficiency of freeing and reallocating\nmemory that can simply be resued after being sanitized. Further, a system\nunder memory pressue runs the risk of allocation failures that could result\nin a crippled driver. Finally, there is a race window where command\nsubmission/compeletion can try to pull/return elements from/to an event\npool that is being deleted or already has been deleted due to the lack of\nhost state around freeing/allocating resources. The following is an example\nof list corruption following a live partition migration (LPM):\n\nOops: Exception in kernel mode, sig: 5 [#1]\nLE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\nModules linked in: vfat fat isofs cdrom ext4 mbcache jbd2 nft_counter nft_compat nf_tables nfnetlink rpadlpar_io rpaphp xsk_diag nfsv3 nfs_acl nfs lockd grace fscache netfs rfkill bonding tls sunrpc pseries_rng drm drm_panel_orientation_quirks xfs libcrc32c dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth vmx_crypto dm_multipath dm_mirror dm_region_hash dm_log dm_mod ipmi_devintf ipmi_msghandler fuse\nCPU: 0 PID: 2108 Comm: ibmvfc_0 Kdump: loaded Not tainted 5.14.0-70.9.1.el9_0.ppc64le #1\nNIP: c0000000007c4bb0 LR: c0000000007c4bac CTR: 00000000005b9a10\nREGS: c00000025c10b760 TRAP: 0700  Not tainted (5.14.0-70.9.1.el9_0.ppc64le)\nMSR: 800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 2800028f XER: 0000000f\nCFAR: c0000000001f55bc IRQMASK: 0\n        GPR00: c0000000007c4bac c00000025c10ba00 c000000002a47c00 000000000000004e\n        GPR04: c0000031e3006f88 c0000031e308bd00 c00000025c10b768 0000000000000027\n        GPR08: 0000000000000000 c0000031e3009dc0 00000031e0eb0000 0000000000000000\n        GPR12: c0000031e2ffffa8 c000000002dd0000 c000000000187108 c00000020fcee2c0\n        GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n        GPR20: 0000000000000000 0000000000000000 0000000000000000 c008000002f81300\n        GPR24: 5deadbeef0000100 5deadbeef0000122 c000000263ba6910 c00000024cc88000\n        GPR28: 000000000000003c c0000002430a0000 c0000002430ac300 000000000000c300\nNIP [c0000000007c4bb0] __list_del_entry_valid+0x90/0x100\nLR [c0000000007c4bac] __list_del_entry_valid+0x8c/0x100\nCall Trace:\n[c00000025c10ba00] [c0000000007c4bac] __list_del_entry_valid+0x8c/0x100 (unreliable)\n[c00000025c10ba60] [c008000002f42284] ibmvfc_free_queue+0xec/0x210 [ibmvfc]\n[c00000025c10bb10] [c008000002f4246c] ibmvfc_deregister_scsi_channel+0xc4/0x160 [ibmvfc]\n[c00000025c10bba0] [c008000002f42580] ibmvfc_release_sub_crqs+0x78/0x130 [ibmvfc]\n[c00000025c10bc20] [c008000002f4f6cc] ibmvfc_do_work+0x5c4/0xc70 [ibmvfc]\n[c00000025c10bce0] [c008000002f4fdec] ibmvfc_work+0x74/0x1e8 [ibmvfc]\n[c00000025c10bda0] [c0000000001872b8] kthread+0x1b8/0x1c0\n[c00000025c10be10] [c00000000000cd64] ret_from_kernel_thread+0x5c/0x64\nInstruction dump:\n40820034 38600001 38210060 4e800020 7c0802a6 7c641b78 3c62fe7a 7d254b78\n3863b590 f8010070 4ba309cd 60000000 <0fe00000> 7c0802a6 3c62fe7a 3863b640\n---[ end trace 11a2b65a92f8b66c ]---\nibmvfc 30000003: Send warning. Receive queue closed, will retry.\n\nAdd registration/deregistration helpers that are called instead during\nconnection resets to sanitize and reconfigure the queues.","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-401"],"references":["https://git.kernel.org/stable/c/161ec2a0807ddd58bc0f24f3e1e7e3d4fef5297f","https://git.kernel.org/stable/c/72ea7fe0db73d65c7d977208842d8ade9b823de9","https://git.kernel.org/stable/c/9f23c499ca601b2a1e1d2e761d03964b739bca0e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49701","score":0.00272,"percentile":0.19655,"date":"2026-11-01"},"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."]}