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            {
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              "status": "unaffected",
              "version": "7.0.1",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: raw: fix ro-\u003euniq use-after-free in raw_rcv()\n\nraw_release() unregisters raw CAN receive filters via can_rx_unregister(),\nbut receiver deletion is deferred with call_rcu(). This leaves a window\nwhere raw_rcv() may still be running in an RCU read-side critical section\nafter raw_release() frees ro-\u003euniq, leading to a use-after-free of the\npercpu uniq storage.\n\nMove free_percpu(ro-\u003euniq) out of raw_release() and into a raw-specific\nsocket destructor. can_rx_unregister() takes an extra reference to the\nsocket and only drops it from the RCU callback, so freeing uniq from\nsk_destruct ensures the percpu area is not released until the relevant\ncallbacks have drained.\n\n[mkl: applied manually]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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 - Exploitation requires local access to create/bind/close CAN_RAW sockets and race them with CAN frame delivery into raw_rcv(). Received CAN frames can trigger the vulnerable callback, but the attacker-controlled setup and free path are local socket operations.\nAC:L - The race is between attacker-controlled socket teardown/filter unregistration and attacker-controlled CAN frame generation, for example using concurrent local sockets and loopback/vcan or an existing CAN interface. No unusual external condition is required beyond timing that can be retried.\nPR:L - CAN_RAW socket creation, bind, setsockopt, send, and close in this path do not impose a CAP_NET_RAW or CAP_NET_ADMIN check for an existing CAN device. If a virtual CAN device must be created, CAP_NET_ADMIN in a user namespace may suffice, so this is still not real init-namespace root.\nUI:N - No victim action is required once the attacker can run local code. The attacker can create the sockets, register filters, generate frames, and close sockets themselves.\nS:U - The vulnerable object and resulting corruption are within the kernel networking/CAN security authority. This is a standard kernel memory corruption issue, not a cross-VM or hardware boundary escape.\nC:H - This is a use-after-free of per-CPU storage accessed from raw_rcv(), and the freed area may be reallocated before the callback reads it. Per the kernel scoring guidance, UAF memory corruption is treated as enabling high confidentiality impact.\nI:H - raw_rcv() writes skb pointers, hashes, and counters through the freed ro-\u003euniq pointer, corrupting whatever per-CPU object reuses that storage. As a UAF with kernel memory corruption, it is defensibly scored as high integrity impact.\nA:H - The stale per-CPU pointer can lead to invalid memory accesses or corruption during softirq CAN receive processing. A kernel oops/panic is a direct plausible outcome."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:23:19.603Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1de30576a6dfeaaa27ef91fa272e6b9240b6fbd3"
        },
        {
          "url": "https://git.kernel.org/stable/c/64c8553decf5a5f2417bd54761ea0a832c56c4ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f43f12fde34737fba091b7e3ab391e14ddbb0be"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e9cfffad898bbeaafd0ea608a6d267362f050fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/572f0bf536ebc14f6e7da3d21a85cf076de8358e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7201a531b9a5ed892bfda5ded9194ef622de8ffa"
        },
        {
          "url": "https://git.kernel.org/stable/c/34c1741254ff972e8375faf176678a248826fe3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a535a9217ca3f2fccedaafb2fddb4c48f27d36dc"
        }
      ],
      "title": "can: raw: fix ro-\u003euniq use-after-free in raw_rcv()",
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31532",
    "datePublished": "2026-04-23T11:12:44.829Z",
    "dateReserved": "2026-03-09T15:48:24.112Z",
    "dateUpdated": "2026-08-05T12:23:19.603Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}