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GHSA-GGHW-9HQP-85HC

Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-18 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

sctp: check RCV_SHUTDOWN after the sendmsg connect wait

sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. If a concurrent shutdown(fd, SHUT_RD) sets RCV_SHUTDOWN, the waiter breaks with err == 0 before checking asoc->base.dead. Its final sctp_association_put() can then free the association, leaving sctp_sendmsg_to_asoc() to continue with a dangling pointer.

Check RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc() before using the association again. The check only accesses the socket, so it needs no additional association reference. Return the existing -ESRCH so that sctp_sendmsg() skips freeing a new association that may already have been destroyed.

Keep sctp_wait_for_connect() unchanged to preserve its behavior for the connect() caller.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98846"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: check RCV_SHUTDOWN after the sendmsg connect wait\n\nsctp_wait_for_connect() drops the socket lock while it sleeps. An\nout-of-the-blue ABORT can then be processed from the socket backlog and\nunlink the association. If a concurrent shutdown(fd, SHUT_RD) sets\nRCV_SHUTDOWN, the waiter breaks with err == 0 before checking\nasoc-\u003ebase.dead. Its final sctp_association_put() can then free the\nassociation, leaving sctp_sendmsg_to_asoc() to continue with a dangling\npointer.\n\nCheck RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc()\nbefore using the association again. The check only accesses the socket,\nso it needs no additional association reference. Return the existing\n-ESRCH so that sctp_sendmsg() skips freeing a new association that may\nalready have been destroyed.\n\nKeep sctp_wait_for_connect() unchanged to preserve its behavior for the\nconnect() caller.",
  "id": "GHSA-gghw-9hqp-85hc",
  "modified": "2026-10-18T18:32:05Z",
  "published": "2026-10-18T18:32:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98846"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98846 (GCVE-0-2026-98846)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:50 – Updated: 2026-10-18 15:50

Title

sctp: check RCV_SHUTDOWN after the sendmsg connect wait

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: check RCV_SHUTDOWN after the sendmsg connect wait sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. If a concurrent shutdown(fd, SHUT_RD) sets RCV_SHUTDOWN, the waiter breaks with err == 0 before checking asoc->base.dead. Its final sctp_association_put() can then free the association, leaving sctp_sendmsg_to_asoc() to continue with a dangling pointer. Check RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc() before using the association again. The check only accesses the socket, so it needs no additional association reference. Return the existing -ESRCH so that sctp_sendmsg() skips freeing a new association that may already have been destroyed. Keep sctp_wait_for_connect() unchanged to preserve its behavior for the connect() caller.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7100 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/e8f972b1759d26bbe…
https://git.kernel.org/stable/c/e701345d886e831fb…
https://git.kernel.org/stable/c/222c41e0f50f1d502…
https://git.kernel.org/stable/c/4f1da630d13de0370…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 668c9beb9020d5834ee9e43c208190a07d2b1928 , < e8f972b1759d26bbefe4c524caae1ed7c8a593bd (git) Affected: 668c9beb9020d5834ee9e43c208190a07d2b1928 , < e701345d886e831fb593a0870d69c8c5de6fc938 (git) Affected: 668c9beb9020d5834ee9e43c208190a07d2b1928 , < 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669 (git) Affected: 668c9beb9020d5834ee9e43c208190a07d2b1928 , < 4f1da630d13de0370e2f6361f961f1c8b384af1c (git)
Linux	Linux	Affected: 4.16 Unaffected: 0 , < 4.16 (semver) Unaffected: 6.12.113 , ≤ 6.12.* (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3-rc6 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/socket.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "e701345d886e831fb593a0870d69c8c5de6fc938",
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              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
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              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.16",
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                },
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-18T15:50:34.714Z",
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    "datePublished": "2026-10-18T15:50:34.714Z",
    "dateReserved": "2026-09-25T10:25:14.373Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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