{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68790","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T10:30:51.037Z","datePublished":"2026-01-13T15:29:02.907Z","dateUpdated":"2026-05-11T21:53:23.333Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:53:23.333Z"},"descriptions":[{"lang":"en","value":"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"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c"],"versions":[{"version":"5a977b5833b7a261bfa6094595ffa73c1071588c","lessThan":"d2495f529d60e8e8c43e6ad524089c38b8be7bc4","status":"affected","versionType":"git"},{"version":"5a977b5833b7a261bfa6094595ffa73c1071588c","lessThan":"6a107cfe9c99a079e578a4c5eb70038101a3599f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c"],"versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","status":"unaffected","versionType":"semver"},{"version":"6.18.3","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4"},{"url":"https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f"}],"title":"net/mlx5: Fix double unregister of HCA_PORTS component","x_generator":{"engine":"bippy-1.2.0"}}}}