CVE-2025-39978 (GCVE-0-2025-39978)
Vulnerability from cvelistv5
Published
2025-10-15 07:55
Modified
2025-10-15 07:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a
Impacted products
Vendor Product Version
Linux Linux Version: 68fbff68dbea35f9e6f7649dd22fce492a5aedac
Version: 68fbff68dbea35f9e6f7649dd22fce492a5aedac
Version: 68fbff68dbea35f9e6f7649dd22fce492a5aedac
Version: 68fbff68dbea35f9e6f7649dd22fce492a5aedac
Version: 68fbff68dbea35f9e6f7649dd22fce492a5aedac
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   Linux Linux Version: 5.14
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "programFiles": [
            "drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.155",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.155",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: Fix potential use after free in otx2_tc_add_flow()\n\nThis code calls kfree_rcu(new_node, rcu) and then dereferences \"new_node\"\nand then dereferences it on the next line.  Two lines later, we take\na mutex so I don\u0027t think this is an RCU safe region.  Re-order it to do\nthe dereferences before queuing up the free."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-15T07:55:58.949Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a"
        },
        {
          "url": "https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56"
        }
      ],
      "title": "octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39978",
    "datePublished": "2025-10-15T07:55:58.949Z",
    "dateReserved": "2025-04-16T07:20:57.150Z",
    "dateUpdated": "2025-10-15T07:55:58.949Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39978\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-15T08:15:35.640\",\"lastModified\":\"2025-10-16T15:29:11.563\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nocteontx2-pf: Fix potential use after free in otx2_tc_add_flow()\\n\\nThis code calls kfree_rcu(new_node, rcu) and then dereferences \\\"new_node\\\"\\nand then dereferences it on the next line.  Two lines later, we take\\na mutex so I don\u0027t think this is an RCU safe region.  Re-order it to do\\nthe dereferences before queuing up the free.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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