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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6666 records in the last 180 days details
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
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{
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          "programFiles": [
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              "operator": "OR"
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          "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)."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-08-22T15:31:50.811Z",
    "dateReserved": "2026-08-15T05:44:03.919Z",
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    "state": "PUBLISHED"
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        "descriptions": [
          {
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            "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)."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nring-buffer: Inicializa el orden de p\u00e1gina del lector en rb_allocate_cpu_buffer()\n\nEn rb_allocate_cpu_buffer(), bpage -\u003e order fue omitido, dej\u00e1ndolo como 0. Esto es un problema para un ring-buffer con subbufs m\u00e1s grandes que PAGE_SIZE si cuando se libera: free_buffer_page() depende de este valor. Alinea el valor con el tama\u00f1o de asignaci\u00f3n real (buffer::subbuf_order)."
          }
        ],
        "id": "CVE-2026-74602",
        "lastModified": "2026-10-14T13:10:00.187",
        "metrics": {},
        "published": "2026-08-22T16:16:32.650",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74602.json",
      "version": "3"
    }
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}



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