CVE-2025-40240 (GCVE-0-2025-40240)

Vulnerability from cvelistv5 – Published: 2025-12-04 15:31 – Updated: 2025-12-04 15:31
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: avoid NULL dereference when chunk data buffer is missing chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only. chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is non-NULL because of outer if() condition.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 61cda2777b07d27459f5cac5a047c3edf9c8a1a9 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 08165c296597075763130919f2aae59b5822f016 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < cb9055ba30306ede4ad920002233d0659982f1cb (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 7a832b0f99be19df608cb75c023f8027b1789bd1 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 89b465b54227c245ddc7cc9ed822231af21123ef (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 441f0647f7673e0e64d4910ef61a5fb8f16bfb82 (git)
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    Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.4.301 , ≤ 5.4.* (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.196 , ≤ 5.15.* (semver)
Unaffected: 6.1.158 , ≤ 6.1.* (semver)
Unaffected: 6.6.115 , ≤ 6.6.* (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/inqueue.c"
          ],
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          "vendor": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.301",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.246",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.196",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.115",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.301",
                  "versionStartIncluding": "4.8",
                  "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\nsctp: avoid NULL dereference when chunk data buffer is missing\n\nchunk-\u003eskb pointer is dereferenced in the if-block where it\u0027s supposed\nto be NULL only.\n\nchunk-\u003eskb can only be NULL if chunk-\u003ehead_skb is not. Check for frag_list\ninstead and do it just before replacing chunk-\u003eskb. We\u0027re sure that\notherwise chunk-\u003eskb is non-NULL because of outer if() condition."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-04T15:31:29.715Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/08165c296597075763130919f2aae59b5822f016"
        },
        {
          "url": "https://git.kernel.org/stable/c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f"
        },
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          "url": "https://git.kernel.org/stable/c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71"
        },
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          "url": "https://git.kernel.org/stable/c/cb9055ba30306ede4ad920002233d0659982f1cb"
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        },
        {
          "url": "https://git.kernel.org/stable/c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82"
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      ],
      "title": "sctp: avoid NULL dereference when chunk data buffer is missing",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40240",
    "datePublished": "2025-12-04T15:31:29.715Z",
    "dateReserved": "2025-04-16T07:20:57.181Z",
    "dateUpdated": "2025-12-04T15:31:29.715Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40240\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-04T16:16:17.100\",\"lastModified\":\"2025-12-04T17:15:08.283\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsctp: avoid NULL dereference when chunk data buffer is missing\\n\\nchunk-\u003eskb pointer is dereferenced in the if-block where it\u0027s supposed\\nto be NULL only.\\n\\nchunk-\u003eskb can only be NULL if chunk-\u003ehead_skb is not. Check for frag_list\\ninstead and do it just before replacing chunk-\u003eskb. We\u0027re sure that\\notherwise chunk-\u003eskb is non-NULL because of outer if() condition.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/08165c296597075763130919f2aae59b5822f016\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a832b0f99be19df608cb75c023f8027b1789bd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89b465b54227c245ddc7cc9ed822231af21123ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb9055ba30306ede4ad920002233d0659982f1cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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