{"cve":"CVE-2025-68790","nvd":{"published":"2026-01-13T16:16:00.880","modified":"2026-06-17T09:59:35.570","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix double unregister of HCA_PORTS component\n\nClear hca_devcom_comp in device's private data after unregistering it in\nLAG teardown. Otherwise a slightly lagging second pass through\nmlx5_unload_one() might try to unregister it again and trip over\nuse-after-free.\n\nOn s390 almost all PCI level recovery events trigger two passes through\nmxl5_unload_one() - one through the poll_health() method and one through\nmlx5_pci_err_detected() as callback from generic PCI error recovery.\nWhile testing PCI error recovery paths with more kernel debug features\nenabled, this issue reproducibly led to kernel panics with the following\ncall chain:\n\n Unable to handle kernel pointer dereference in virtual kernel address space\n Failing address: 6b6b6b6b6b6b6000 TEID: 6b6b6b6b6b6b6803 ESOP-2 FSI\n Fault in home space mode while using kernel ASCE.\n AS:00000000705c4007 R3:0000000000000024\n Oops: 0038 ilc:3 [#1]SMP\n\n CPU: 14 UID: 0 PID: 156 Comm: kmcheck Kdump: loaded Not tainted\n      6.18.0-20251130.rc7.git0.16131a59cab1.300.fc43.s390x+debug #1 PREEMPT\n\n Krnl PSW : 0404e00180000000 0000020fc86aa1dc (__lock_acquire+0x5c/0x15f0)\n            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\n Krnl GPRS: 0000000000000000 0000020f00000001 6b6b6b6b6b6b6c33 0000000000000000\n            0000000000000000 0000000000000000 0000000000000001 0000000000000000\n            0000000000000000 0000020fca28b820 0000000000000000 0000010a1ced8100\n            0000010a1ced8100 0000020fc9775068 0000018fce14f8b8 0000018fce14f7f8\n Krnl Code: 0000020fc86aa1cc: e3b003400004        lg      %r11,832\n            0000020fc86aa1d2: a7840211           brc     8,0000020fc86aa5f4\n           *0000020fc86aa1d6: c09000df0b25       larl    %r9,0000020fca28b820\n           >0000020fc86aa1dc: d50790002000       clc     0(8,%r9),0(%r2)\n            0000020fc86aa1e2: a7840209           brc     8,0000020fc86aa5f4\n            0000020fc86aa1e6: c0e001100401       larl    %r14,0000020fca8aa9e8\n            0000020fc86aa1ec: c01000e25a00       larl    %r1,0000020fca2f55ec\n            0000020fc86aa1f2: a7eb00e8           aghi    %r14,232\n\n Call Trace:\n  __lock_acquire+0x5c/0x15f0\n  lock_acquire.part.0+0xf8/0x270\n  lock_acquire+0xb0/0x1b0\n  down_write+0x5a/0x250\n  mlx5_detach_device+0x42/0x110 [mlx5_core]\n  mlx5_unload_one_devl_locked+0x50/0xc0 [mlx5_core]\n  mlx5_unload_one+0x42/0x60 [mlx5_core]\n  mlx5_pci_err_detected+0x94/0x150 [mlx5_core]\n  zpci_event_attempt_error_recovery+0xcc/0x388","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f","https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2025-68790","score":0.00186,"percentile":0.08247,"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."]}