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            "value": "Reported to Red Hat."
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix pedit partial COW leading to page cache corruption\n\ntcf_pedit_act() computes the COW range for skb_ensure_writable()\nonce before the key loop using tcfp_off_max_hint, but the hint does\nnot account for the runtime header offset added by typed keys. This\ncan leave part of the write region un-COW\u0027d.\n\nFix by moving skb_ensure_writable() inside the per-key loop where\nthe actual write offset is known, and add overflow checking on the\noffset arithmetic. For negative offsets (e.g. Ethernet header edits\nat ingress), use skb_cow() to COW the headroom instead. Guard\noffset_valid() against INT_MIN, where negation is undefined."
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable pedit action is reached through local tc/rtnetlink configuration and local packet generation, not by unauthenticated network input alone. Even if remote traffic can traverse an already configured pedit rule, creating the exploitable action is a local operation.\nAC:L - There is no attacker-uncontrolled race; the attacker can choose the pedit key, header type, offset, and traffic shape. The partial COW condition is deterministic once suitable shared or page-cache-backed skbs are generated.\nPR:L - Installing the pedit action through RTM_NEWTFILTER requires CAP_NET_ADMIN in the network namespace. With unprivileged user namespaces, a basic local user can obtain namespace CAP_NET_ADMIN, so this is Low rather than High.\nUI:N - The attacker can configure the tc action and generate the triggering traffic without requiring any victim action. No user needs to open a file, mount a filesystem, or interact with crafted data.\nS:U - The vulnerability is in the kernel networking subsystem and impacts kernel-managed memory and page cache within the same security authority. It is a standard local kernel privilege-escalation/data-corruption issue, not a VM escape or separate-scope boundary bypass.\nC:H - The bug permits corruption of shared skb/page-cache memory outside the intended COW range, which is kernel memory/data corruption. Such corruption is defensibly usable for privilege escalation, after which protected information can be read.\nI:H - The vulnerable path gives attacker-influenced writes into shared page-cache-backed packet data that should have been private. This can corrupt protected data or code pages and is defensibly a high-integrity arbitrary data modification primitive.\nA:H - Repeated page cache or kernel memory corruption can crash the kernel, corrupt critical cached files, or destabilize networking and userspace execution. A kernel crash or system-wide corruption warrants High availability impact."
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:31:25.966Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/544d857b42a1734b923040e13aa61a6fd4746cf2"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/a071e057518decc5e3bec89855758f5f8786f2c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/b685d6ef6f07a3b5ce814565a25f39f2157538a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b"
        },
        {
          "url": "https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313"
        },
        {
          "url": "https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512"
        },
        {
          "url": "https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a"
        }
      ],
      "title": "net/sched: fix pedit partial COW leading to page cache corruption",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46331",
    "datePublished": "2026-06-16T06:26:21.066Z",
    "dateReserved": "2026-05-13T15:03:33.112Z",
    "dateUpdated": "2026-09-15T12:04:26.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}