Vulnerability-Lookup

FKIE_CVE-2024-50294

Vulnerability from fkie_nvd - Published: 2024-11-19 02:16 - Updated: 2026-08-04 11:21

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix missing locking causing hanging calls If a call gets aborted (e.g. because kafs saw a signal) between it being queued for connection and the I/O thread picking up the call, the abort will be prioritised over the connection and it will be removed from local->new_client_calls by rxrpc_disconnect_client_call() without a lock being held. This may cause other calls on the list to disappear if a race occurs. Fix this by taking the client_call_lock when removing a call from whatever list its ->wait_link happens to be on.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/996a7208dadbf2cdda8d51444d5ee1fdd1ccbc92	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b1fdb0bb3b6513f5bd26f92369fd6ac1a2422d8b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fc9de52de38f656399d2ce40f7349a6b5f86e787	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12

JSON

To clipboard

{
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    },
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  "id": "CVE-2024-50294",
  "lastModified": "2026-08-04T11:21:42.830",
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}

CVE-2024-50294 (GCVE-0-2024-50294)

Vulnerability from cvelistv5 – Published: 2024-11-19 01:30 – Updated: 2026-08-05 11:43

Title

rxrpc: Fix missing locking causing hanging calls

Summary

Severity

7.8 (High)


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

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 20:14 UTC

CWE

CWE-667 - Improper Locking

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/996a7208dadbf2cdd…
https://git.kernel.org/stable/c/b1fdb0bb3b6513f5b…
https://git.kernel.org/stable/c/fc9de52de38f65639…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d , < 996a7208dadbf2cdda8d51444d5ee1fdd1ccbc92 (git) Affected: 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d , < b1fdb0bb3b6513f5bd26f92369fd6ac1a2422d8b (git) Affected: 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d , < fc9de52de38f656399d2ce40f7349a6b5f86e787 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.61 , ≤ 6.6.* (semver) Unaffected: 6.11.8 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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              "value": "AV:L - The race is driven entirely by local syscalls on an AF_RXRPC socket \u2014 sendmsg() to queue client calls on local-\u003enew_client_calls plus an RXRPC_ABORT cmsg/signal/close to trigger the unlocked list_del_init(). A call in this window has no cid, no connection and is not on peer-\u003eerror_targets, so no received packet or ICMP error can reach it.\nAC:L - The attacker owns both sides of the race: one thread spams client-call creation (locked list_add_tail) while another aborts calls still in RXRPC_CALL_CLIENT_AWAIT_CONN (unlocked list_del_init), and it can be retried in a tight loop with the I/O thread kept busy to widen the window. AF_RXRPC is built as a module in major distros and autoloads on socket creation.\nPR:L - There are no capable()/CAP_* checks anywhere in net/rxrpc, and creating an AF_RXRPC socket requires no privilege (the module autoloads via net-pf-33). Any unprivileged local user can open the socket and drive both sides of the race.\nUI:N - The attacker performs every step itself via its own socket; no victim action, mount, or file access is required.\nS:U - The corruption is confined to kernel memory managed by the same kernel security authority \u2014 no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The list corruption can leave a freed rxrpc_call still linked into local-\u003enew_client_calls after rxrpc_disconnect_call() drops the io_thread reference, and rxrpc_cleanup_call()/rxrpc_destroy_call() never unlink wait_link; the I/O thread then reads that freed object (call-\u003ebundle, wait_link pointers), a use-after-free read leveragable for kernel memory disclosure.\nI:H - The same stale link gives use-after-free writes \u2014 list_move_tail() and rxrpc_activate_one_channel() store into the freed/reused object (call-\u003econn, call-\u003ecid, call-\u003ecall_id, wake_up(\u0026call-\u003ewaitq)) \u2014 and the corrupted prev-\u003enext = new store writes an attacker-influenced pointer into groomable memory, a control-flow-hijack-capable primitive.\nA:H - The documented symptom is calls silently vanishing from the list and hanging forever with sendmsg blocked in rxrpc_wait_to_be_connected(); the corrupted head can also spin rxrpc_connect_client_calls()\u0027s loop or oops the rxrpc I/O thread, killing every call on that local endpoint including the in-kernel AFS client."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:43:10.106Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/996a7208dadbf2cdda8d51444d5ee1fdd1ccbc92"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1fdb0bb3b6513f5bd26f92369fd6ac1a2422d8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc9de52de38f656399d2ce40f7349a6b5f86e787"
        }
      ],
      "title": "rxrpc: Fix missing locking causing hanging calls",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50294",
    "datePublished": "2024-11-19T01:30:40.699Z",
    "dateReserved": "2024-10-21T19:36:19.986Z",
    "dateUpdated": "2026-08-05T11:43:10.106Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

Vulnerability timeline

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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.
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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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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