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CVE-2024-27404 (GCVE-0-2024-27404)

Vulnerability from cvelistv5 – Published: 2024-05-17 11:40 – Updated: 2026-08-05 11:29
VLAI
Title
mptcp: fix data races on remote_id
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data races on remote_id Similar to the previous patch, address the data race on remote_id, adding the suitable ONCE annotations.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-17 17:39 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bedee0b561138346967cf1443f2afd1b48b3148f , < e64148635509bf13eea851986f5a0b150e5bd066 (git)
Affected: bedee0b561138346967cf1443f2afd1b48b3148f , < 2dba5774e8ed326a78ad4339d921a4291281ea6e (git)
Affected: bedee0b561138346967cf1443f2afd1b48b3148f , < 987c3ed7297e5661bc7f448f06fc366e497ac9b2 (git)
Affected: bedee0b561138346967cf1443f2afd1b48b3148f , < 967d3c27127e71a10ff5c083583a038606431b61 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.6.19 , ≤ 6.6.* (semver)
Unaffected: 6.7.7 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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                "url": "https://git.kernel.org/stable/c/967d3c27127e71a10ff5c083583a038606431b61"
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            ],
            "title": "CVE Program Container"
          },
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            "metrics": [
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                "other": {
                  "content": {
                    "id": "CVE-2024-27404",
                    "options": [
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                        "Exploitation": "none"
                      },
                      {
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                      {
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                    "role": "CISA Coordinator",
                    "timestamp": "2024-06-17T17:39:39.256806Z",
                    "version": "2.0.3"
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              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
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              "product": "Linux",
              "programFiles": [
                "net/mptcp/pm_netlink.c",
                "net/mptcp/subflow.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versions": [
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                  "version": "0",
                  "versionType": "semver"
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                  "version": "6.1.81",
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                  "version": "6.6.19",
                  "versionType": "semver"
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                  "version": "6.7.7",
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                  "status": "unaffected",
                  "version": "6.8",
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                  "value": "AV:N - Both sides of the race are driven by remote MPTCP protocol data \u2014 the peer\u0027s MP_JOIN SYN-ACK writes `remote_id` from softirq via `subflow_finish_connect()`, while the peer\u0027s RM_ADDR/ADD_ADDR options drive the concurrent path-manager reads in `mptcp_pm_nl_rm_addr_or_subflow()` and `fill_remote_addresses_vec()`. No local access is needed.\nAC:L - The remote peer controls both racing sides and their timing: it chooses when to emit the MP_JOIN SYN-ACK carrying `join_id` and when to send RM_ADDR/ADD_ADDR that schedules the PM worker, and it can repeat this across many subflows and connections until the window is hit.\nPR:N - An MPTCP-enabled listening service accepts connections from any unauthenticated remote peer, and subflow creation plus ADD_ADDR/RM_ADDR signalling occur as part of normal protocol operation with no credentials required.\nUI:N - The MPTCP option exchange and path-manager subflow handling happen automatically inside the kernel once a connection is accepted; no local user action is involved.\nS:U - The unsynchronized access and all resulting effects are confined to the kernel networking stack\u0027s own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - `remote_id` is a u8 that is never used as an array index or pointer, and the only value exposed is the peer\u0027s own address ID via diag/netlink; no kernel memory contents are disclosed.\nI:L - Inconsistent reads let the path manager act on a wrong subflow identity \u2014 bypassing the `deny_id0` join restriction in `fill_remote_addresses_vec()` and underflowing the u8 `pm.add_addr_accepted`/`pm.local_addr_used` counters \u2014 which is limited, non-arbitrary modification of kernel connection state.\nA:H - A mismatched `remote_id` compare in `mptcp_pm_nl_rm_addr_or_subflow()` causes `mptcp_subflow_shutdown()` and `mptcp_close_ssk()` to tear down subflows the peer did not ask to remove \u2014 potentially the last remaining one, collapsing the MPTCP connection \u2014 and this is remotely and repeatably triggerable without authentication."
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        "cveId": "CVE-2024-27404",
        "datePublished": "2024-05-17T11:40:21.607Z",
        "dateReserved": "2024-02-25T13:47:42.681Z",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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Related by attack behaviour

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