CVE-2025-68790 - Vulnerability Details

Vendors	Products
Linux Subscribe	Linux Kernel Subscribe

Link	Providers
https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f
https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix double unregister of HCA_PORTS component Clear hca_devcom_comp in device's private data after unregistering it in LAG teardown. Otherwise a slightly lagging second pass through mlx5_unload_one() might try to unregister it again and trip over use-after-free. On s390 almost all PCI level recovery events trigger two passes through mxl5_unload_one() - one through the poll_health() method and one through mlx5_pci_err_detected() as callback from generic PCI error recovery. While testing PCI error recovery paths with more kernel debug features enabled, this issue reproducibly led to kernel panics with the following call chain: Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 6b6b6b6b6b6b6000 TEID: 6b6b6b6b6b6b6803 ESOP-2 FSI Fault in home space mode while using kernel ASCE. AS:00000000705c4007 R3:0000000000000024 Oops: 0038 ilc:3 [#1]SMP CPU: 14 UID: 0 PID: 156 Comm: kmcheck Kdump: loaded Not tainted 6.18.0-20251130.rc7.git0.16131a59cab1.300.fc43.s390x+debug #1 PREEMPT Krnl PSW : 0404e00180000000 0000020fc86aa1dc (__lock_acquire+0x5c/0x15f0) 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 Krnl GPRS: 0000000000000000 0000020f00000001 6b6b6b6b6b6b6c33 0000000000000000 0000000000000000 0000000000000000 0000000000000001 0000000000000000 0000000000000000 0000020fca28b820 0000000000000000 0000010a1ced8100 0000010a1ced8100 0000020fc9775068 0000018fce14f8b8 0000018fce14f7f8 Krnl Code: 0000020fc86aa1cc: e3b003400004 lg %r11,832 0000020fc86aa1d2: a7840211 brc 8,0000020fc86aa5f4 *0000020fc86aa1d6: c09000df0b25 larl %r9,0000020fca28b820 >0000020fc86aa1dc: d50790002000 clc 0(8,%r9),0(%r2) 0000020fc86aa1e2: a7840209 brc 8,0000020fc86aa5f4 0000020fc86aa1e6: c0e001100401 larl %r14,0000020fca8aa9e8 0000020fc86aa1ec: c01000e25a00 larl %r1,0000020fca2f55ec 0000020fc86aa1f2: a7eb00e8 aghi %r14,232 Call Trace: __lock_acquire+0x5c/0x15f0 lock_acquire.part.0+0xf8/0x270 lock_acquire+0xb0/0x1b0 down_write+0x5a/0x250 mlx5_detach_device+0x42/0x110 [mlx5_core] mlx5_unload_one_devl_locked+0x50/0xc0 [mlx5_core] mlx5_unload_one+0x42/0x60 [mlx5_core] mlx5_pci_err_detected+0x94/0x150 [mlx5_core] zpci_event_attempt_error_recovery+0xcc/0x388
Title		net/mlx5: Fix double unregister of HCA_PORTS component
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4

{"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": "2026-01-13T15:29:02.907Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-01-13T15:29:02.907Z"}, "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-rc2", "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-rc2"}]}]}], "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"}}}}

{"cveTags": [], "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"}], "id": "CVE-2025-68790", "lastModified": "2026-01-13T16:16:00.880", "metrics": {}, "published": "2026-01-13T16:16:00.880", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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