Vulnerability-Lookup

GHSA-C6GV-GFXC-VRWH

Vulnerability from github – Published: 2024-07-12 15:31 – Updated: 2025-11-04 00:30

Details

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

mptcp: ensure snd_una is properly initialized on connect

This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized.

Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40931"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: ensure snd_una is properly initialized on connect\n\nThis is strictly related to commit fb7a0d334894 (\"mptcp: ensure snd_nxt\nis properly initialized on connect\"). It turns out that syzkaller can\ntrigger the retransmit after fallback and before processing any other\nincoming packet - so that snd_una is still left uninitialized.\n\nAddress the issue explicitly initializing snd_una together with snd_nxt\nand write_seq.",
  "id": "GHSA-c6gv-gfxc-vrwh",
  "modified": "2025-11-04T00:30:54Z",
  "published": "2024-07-12T15:31:28Z",
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      "type": "CVSS_V3"
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}

CVE-2024-40931 (GCVE-0-2024-40931)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:25 – Updated: 2026-05-11 20:22

Title

mptcp: ensure snd_una is properly initialized on connect

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure snd_una is properly initialized on connect This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized. Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:04 UTC

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/208cd22ef5e57f82d…
https://git.kernel.org/stable/c/7b9c7fc8600b64a86…
https://git.kernel.org/stable/c/f03c46eabb3a67bd2…
https://git.kernel.org/stable/c/f1f0a46f8bb8890b9…
https://git.kernel.org/stable/c/ef473bf1dd7e8dd08…
https://git.kernel.org/stable/c/8031b58c3a9b1db3e…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < 208cd22ef5e57f82d38ec11c1a1703f9401d6dde (git) Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < 7b9c7fc8600b64a86e4b47b2d190bba380267726 (git) Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < f03c46eabb3a67bd2993e237ab5517f00a5f1813 (git) Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f (git) Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce (git) Affected: 8fd738049ac3d67a937d36577763b47180aae1ad , < 8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3 (git)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 5.10.221 , ≤ 5.10.* (semver) Unaffected: 5.15.162 , ≤ 5.15.* (semver) Unaffected: 6.1.95 , ≤ 6.1.* (semver) Unaffected: 6.6.35 , ≤ 6.6.* (semver) Unaffected: 6.9.6 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)

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JSON

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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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-C6GV-GFXC-VRWH

CVE-2024-40931 (GCVE-0-2024-40931)

Tags

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Nomenclature

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