cve/published/2025/CVE-2025-21972.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: unshare packets when reassembling\n\nEnsure that the frag_list used for reassembly isn't shared with other\npackets. This avoids incorrect reassembly when packets are cloned, and\nprevents a memory leak due to circular references between fragments and\ntheir skb_shared_info.\n\nThe upcoming MCTP-over-USB driver uses skb_clone which can trigger the\nproblem - other MCTP drivers don't share SKBs.\n\nA kunit test is added to reproduce the issue."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/mctp/route.c",
                  "net/mctp/test/route-test.c"
               ],
               "versions": [
                  {
                     "version": "4a992bbd365094730a31bae1e12a6ca695336d57",
                     "lessThan": "5c47d5bfa7b096cf8890afac32141c578583f8e0",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "4a992bbd365094730a31bae1e12a6ca695336d57",
                     "lessThan": "f44fff3d3c6cd67b6f348b821d73c4d6888c7a6e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "4a992bbd365094730a31bae1e12a6ca695336d57",
                     "lessThan": "f5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/mctp/route.c",
                  "net/mctp/test/route-test.c"
               ],
               "versions": [
                  {
                     "version": "5.15",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.15",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.12.20",
                     "lessThanOrEqual": "6.12.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.13.8",
                     "lessThanOrEqual": "6.13.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.14",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.15",
                           "versionEndExcluding": "6.12.20"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.15",
                           "versionEndExcluding": "6.13.8"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.15",
                           "versionEndExcluding": "6.14"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/5c47d5bfa7b096cf8890afac32141c578583f8e0"
            },
            {
               "url": "https://git.kernel.org/stable/c/f44fff3d3c6cd67b6f348b821d73c4d6888c7a6e"
            },
            {
               "url": "https://git.kernel.org/stable/c/f5d83cf0eeb90fade4d5c4d17d24b8bee9ceeecc"
            }
         ],
         "title": "net: mctp: unshare packets when reassembling",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2025-21972",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}