{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74719",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74719"
  ],
  "published": "2026-08-22T15:32:12Z",
  "summary": "net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()\n\nThe SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in\nsmc_llc_event_handler() stores an incoming qentry into the local LLC flow\nwithout first checking whether a qentry is already pending. If a malicious or\nbuggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is\nactive and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the\npointer without freeing the previous allocation, leaking one kmalloc-96 object\nper spurious message.\n\nThe sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry\nguard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a\nduplicate message when qentry is already occupied falls through to break and is\nfreed by the kfree(qentry) at the out: label, rather than silently leaking the\nexisting allocation.\n\nThe response direction (smc_llc_rx_response()) is unaffected: it already guards\nwith flow->qentry at the equivalent site and drops duplicate responses\ncorrectly.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74719"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e384f3cba6ea709f5b2272b1770db4ce14047f78"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a1e980d7a9e7ee6faf4f5fd7b450413b969af26d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e0eb87677c76b157cdf8eb7c1f19e56227165a33"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/06734dfeaeba886aab1bf147249195b888ac3e4d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c23c409228629107203d3c3e95fff1473173f1a6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/10cb31b2b74cb664c6c95cf72364d7d5c483ab82"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bfc336a9fbbf09805f3dfe25c195a4db90af2846"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/976245094925bab9bc39366b2e9ab44ffcde61d0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-22T15:32:12Z"
  }
}