CVE-2025-68790 (GCVE-0-2025-68790)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-02-09 08:33
VLAI?
Title
net/mlx5: Fix double unregister of HCA_PORTS component
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5a977b5833b7a261bfa6094595ffa73c1071588c , < d2495f529d60e8e8c43e6ad524089c38b8be7bc4 (git)
Affected: 5a977b5833b7a261bfa6094595ffa73c1071588c , < 6a107cfe9c99a079e578a4c5eb70038101a3599f (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d2495f529d60e8e8c43e6ad524089c38b8be7bc4",
              "status": "affected",
              "version": "5a977b5833b7a261bfa6094595ffa73c1071588c",
              "versionType": "git"
            },
            {
              "lessThan": "6a107cfe9c99a079e578a4c5eb70038101a3599f",
              "status": "affected",
              "version": "5a977b5833b7a261bfa6094595ffa73c1071588c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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\u0027s 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           \u003e0000020fc86aa1dc: 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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:33:37.206Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68790",
    "datePublished": "2026-01-13T15:29:02.907Z",
    "dateReserved": "2025-12-24T10:30:51.037Z",
    "dateUpdated": "2026-02-09T08:33:37.206Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68790\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:00.880\",\"lastModified\":\"2026-01-14T16:26:00.933\",\"vulnStatus\":\"Awaiting Analysis\",\"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\u0027s 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           \u003e0000020fc86aa1dc: 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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6a107cfe9c99a079e578a4c5eb70038101a3599f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d2495f529d60e8e8c43e6ad524089c38b8be7bc4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.