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CVE-2026-68378 (GCVE-0-2026-68378)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-17 05:04
VLAI
Title
dpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync()
Summary
In the Linux kernel, the following vulnerability has been resolved: dpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync() When a dpll_pin is shared across multiple dpll_device instances and those devices are being unregistered (e.g. during driver module removal), a NULL pointer dereference can occur in dpll_msg_add_pin_ref_sync(). This happens under the following conditions: - A pin is registered with two or more dpll devices (dpll_A, dpll_B) - The pin has ref_sync pairs with other pins - During unregistration of dpll_A's pins, a ref_sync partner pin is unregistered first, removing it from dpll_A->pin_refs - But since the partner pin is still registered with dpll_B, its dpll_refs is not empty, so dpll_pin_ref_sync_pair_del() does NOT run and the partner stays in the pin's ref_sync_pins xarray - When the pin itself is then unregistered from dpll_A, the delete notification calls dpll_msg_add_pin_ref_sync() which finds the partner in ref_sync_pins, passes dpll_pin_available() (partner is still registered with dpll_B), but dpll_pin_on_dpll_priv(dpll_A, partner) returns NULL because partner was already removed from dpll_A->pin_refs - The NULL priv pointer is passed to the driver's ref_sync_get callback, which dereferences it BUG: kernel NULL pointer dereference, address: 0000000000000034 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:zl3073x_dpll_input_pin_ref_sync_get+0x73/0x80 [zl3073x] Call Trace: dpll_msg_add_pin_ref_sync+0xb8/0x200 dpll_cmd_pin_get_one+0x3b6/0x4b0 dpll_pin_event_send+0x72/0x140 __dpll_pin_unregister+0x5a/0x2b0 dpll_pin_unregister+0x49/0x70 Fix this by skipping ref_sync pins whose priv pointer cannot be resolved for the current dpll device.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 40466ea1827c46c6435fab9b21b63b80733e2d07 , < 66fbe0499ef517ab161b96c49886a891851f6481 (git)
Affected: 58256a26bfb37a94738dd65618b1f31f460f8d91 , < 51c2fcc4cd2e4c52bd1970558f6e5356fdc51154 (git)
Affected: 58256a26bfb37a94738dd65618b1f31f460f8d91 , < 4b3e6b9fdaeb40c6a2f7c41db3888b6ee628bdd2 (git)
Affected: 58256a26bfb37a94738dd65618b1f31f460f8d91 , < d2e914a4a0d0f753dbae830264850d044026167c (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dpll/dpll_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "40466ea1827c46c6435fab9b21b63b80733e2d07",
              "versionType": "git"
            },
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              "lessThan": "51c2fcc4cd2e4c52bd1970558f6e5356fdc51154",
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              "version": "58256a26bfb37a94738dd65618b1f31f460f8d91",
              "versionType": "git"
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              "status": "affected",
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            },
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              "versionType": "git"
            }
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dpll/dpll_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync()\n\nWhen a dpll_pin is shared across multiple dpll_device instances and\nthose devices are being unregistered (e.g. during driver module removal),\na NULL pointer dereference can occur in dpll_msg_add_pin_ref_sync().\n\nThis happens under the following conditions:\n - A pin is registered with two or more dpll devices (dpll_A, dpll_B)\n - The pin has ref_sync pairs with other pins\n - During unregistration of dpll_A\u0027s pins, a ref_sync partner pin is\n   unregistered first, removing it from dpll_A-\u003epin_refs\n - But since the partner pin is still registered with dpll_B, its\n   dpll_refs is not empty, so dpll_pin_ref_sync_pair_del() does NOT\n   run and the partner stays in the pin\u0027s ref_sync_pins xarray\n - When the pin itself is then unregistered from dpll_A, the delete\n   notification calls dpll_msg_add_pin_ref_sync() which finds the\n   partner in ref_sync_pins, passes dpll_pin_available() (partner is\n   still registered with dpll_B), but dpll_pin_on_dpll_priv(dpll_A,\n   partner) returns NULL because partner was already removed from\n   dpll_A-\u003epin_refs\n - The NULL priv pointer is passed to the driver\u0027s ref_sync_get\n   callback, which dereferences it\n\n BUG: kernel NULL pointer dereference, address: 0000000000000034\n Oops: Oops: 0000 [#1] SMP NOPTI\n RIP: 0010:zl3073x_dpll_input_pin_ref_sync_get+0x73/0x80 [zl3073x]\n Call Trace:\n  dpll_msg_add_pin_ref_sync+0xb8/0x200\n  dpll_cmd_pin_get_one+0x3b6/0x4b0\n  dpll_pin_event_send+0x72/0x140\n  __dpll_pin_unregister+0x5a/0x2b0\n  dpll_pin_unregister+0x49/0x70\n\nFix this by skipping ref_sync pins whose priv pointer cannot be resolved\nfor the current dpll device."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:04:24.219Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/66fbe0499ef517ab161b96c49886a891851f6481"
        },
        {
          "url": "https://git.kernel.org/stable/c/51c2fcc4cd2e4c52bd1970558f6e5356fdc51154"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b3e6b9fdaeb40c6a2f7c41db3888b6ee628bdd2"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2e914a4a0d0f753dbae830264850d044026167c"
        }
      ],
      "title": "dpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68378",
    "datePublished": "2026-08-10T12:03:56.590Z",
    "dateReserved": "2026-07-30T09:28:09.387Z",
    "dateUpdated": "2026-08-17T05:04:24.219Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68378",
      "date": "2026-09-10",
      "epss": "0.002",
      "percentile": "0.09921"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68378\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:30.813\",\"lastModified\":\"2026-08-17T06:17:46.260\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync()\\n\\nWhen a dpll_pin is shared across multiple dpll_device instances and\\nthose devices are being unregistered (e.g. during driver module removal),\\na NULL pointer dereference can occur in dpll_msg_add_pin_ref_sync().\\n\\nThis happens under the following conditions:\\n - A pin is registered with two or more dpll devices (dpll_A, dpll_B)\\n - The pin has ref_sync pairs with other pins\\n - During unregistration of dpll_A\u0027s pins, a ref_sync partner pin is\\n   unregistered first, removing it from dpll_A-\u003epin_refs\\n - But since the partner pin is still registered with dpll_B, its\\n   dpll_refs is not empty, so dpll_pin_ref_sync_pair_del() does NOT\\n   run and the partner stays in the pin\u0027s ref_sync_pins xarray\\n - When the pin itself is then unregistered from dpll_A, the delete\\n   notification calls dpll_msg_add_pin_ref_sync() which finds the\\n   partner in ref_sync_pins, passes dpll_pin_available() (partner is\\n   still registered with dpll_B), but dpll_pin_on_dpll_priv(dpll_A,\\n   partner) returns NULL because partner was already removed from\\n   dpll_A-\u003epin_refs\\n - The NULL priv pointer is passed to the driver\u0027s ref_sync_get\\n   callback, which dereferences it\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000034\\n Oops: Oops: 0000 [#1] SMP NOPTI\\n RIP: 0010:zl3073x_dpll_input_pin_ref_sync_get+0x73/0x80 [zl3073x]\\n Call Trace:\\n  dpll_msg_add_pin_ref_sync+0xb8/0x200\\n  dpll_cmd_pin_get_one+0x3b6/0x4b0\\n  dpll_pin_event_send+0x72/0x140\\n  __dpll_pin_unregister+0x5a/0x2b0\\n  dpll_pin_unregister+0x49/0x70\\n\\nFix this by skipping ref_sync pins whose priv pointer cannot be resolved\\nfor the current dpll device.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/dpll/dpll_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"40466ea1827c46c6435fab9b21b63b80733e2d07\",\"lessThan\":\"66fbe0499ef517ab161b96c49886a891851f6481\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58256a26bfb37a94738dd65618b1f31f460f8d91\",\"lessThan\":\"51c2fcc4cd2e4c52bd1970558f6e5356fdc51154\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58256a26bfb37a94738dd65618b1f31f460f8d91\",\"lessThan\":\"4b3e6b9fdaeb40c6a2f7c41db3888b6ee628bdd2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58256a26bfb37a94738dd65618b1f31f460f8d91\",\"lessThan\":\"d2e914a4a0d0f753dbae830264850d044026167c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/dpll/dpll_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4b3e6b9fdaeb40c6a2f7c41db3888b6ee628bdd2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/51c2fcc4cd2e4c52bd1970558f6e5356fdc51154\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/66fbe0499ef517ab161b96c49886a891851f6481\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d2e914a4a0d0f753dbae830264850d044026167c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-31T11:45:21+00:00",
      "cve": "CVE-2026-68378",
      "id": "CVE-2026-68378",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "93",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dpll: fix NULL pointer dereference in dpll_msg_add_pin_ref_sync()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68378.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-17T16:28:17Z",
      "cve": "CVE-2026-68378",
      "id": "CVE-2026-68378",
      "initial_release_date": "2026-08-12T16:22:37Z",
      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68378",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68378.json",
      "version": "3"
    }
  }
}



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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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