CVE-2026-74602 (GCVE-0-2026-74602)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:31 – Updated: 2026-08-23 12:47
VLAI
Title
ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()
Summary
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer() In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 7c620d89bae1a926ab7d626600285d3516c9f3c4 (git)
Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 2e37f2bf111429fbfa4d985b12df3ba496ca70aa (git)
Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a (git)
Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 6d014e44b68ddd43f71288d2a4dbb1a259869149 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.105 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7c620d89bae1a926ab7d626600285d3516c9f3c4",
              "status": "affected",
              "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
              "versionType": "git"
            },
            {
              "lessThan": "2e37f2bf111429fbfa4d985b12df3ba496ca70aa",
              "status": "affected",
              "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
              "versionType": "git"
            },
            {
              "lessThan": "3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a",
              "status": "affected",
              "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
              "versionType": "git"
            },
            {
              "lessThan": "6d014e44b68ddd43f71288d2a4dbb1a259869149",
              "status": "affected",
              "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "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": "6.12.105",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\n\nIn rb_allocate_cpu_buffer(), bpage-\u003eorder was omitted, leaving it as 0.\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\nwhen freed: free_buffer_page() relies on this value. Align the value\nwith the actual allocation size (buffer::subbuf_order)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:47:43.108Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149"
        }
      ],
      "title": "ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74602",
    "datePublished": "2026-08-22T15:31:50.811Z",
    "dateReserved": "2026-08-15T05:44:03.919Z",
    "dateUpdated": "2026-08-23T12:47:43.108Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74602",
      "date": "2026-08-29",
      "epss": "0.00168",
      "percentile": "0.06299"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74602\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:32.650\",\"lastModified\":\"2026-08-23T13:16:46.710\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\\n\\nIn rb_allocate_cpu_buffer(), bpage-\u003eorder was omitted, leaving it as 0.\\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\\nwhen freed: free_buffer_page() relies on this value. Align the value\\nwith the actual allocation size (buffer::subbuf_order).\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/trace/ring_buffer.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f9b94daa542a8d2532f0930f01cd9aec2d19621b\",\"lessThan\":\"7c620d89bae1a926ab7d626600285d3516c9f3c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9b94daa542a8d2532f0930f01cd9aec2d19621b\",\"lessThan\":\"2e37f2bf111429fbfa4d985b12df3ba496ca70aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9b94daa542a8d2532f0930f01cd9aec2d19621b\",\"lessThan\":\"3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f9b94daa542a8d2532f0930f01cd9aec2d19621b\",\"lessThan\":\"6d014e44b68ddd43f71288d2a4dbb1a259869149\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/trace/ring_buffer.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"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/2e37f2bf111429fbfa4d985b12df3ba496ca70aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-24T13:30:52+00:00",
      "cve": "CVE-2026-74602",
      "id": "CVE-2026-74602",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74602.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.